6 research outputs found
Kincir Air Kaki Angsa Model Turbin Ganda Untuk Menggerakkan Generator AC 3 Fasa Sistem Penguat Luar
No full textABSTRAK Yahya Armanto., 2013. Pembuatan Kincir Air Kaki Angsa Model Turbin Ganda Untuk Menggerakkan Generator AC Tiga Fasa Sistem Penguat Luar, Jurusan Teknik Elektro Falkultas Teknik Universitas Negeri Malang. Pembimbing: (I Drs. Dwi Prihanto, S.S.T., M.Pd. (II Drs. Sujono, M.T. Kata Kunci: kincir air kaki angsa model turbin ganda, dan generator AC tiga fasa. Permasalahan yang terjadi sekarang adalah: Negara Indonesia merupakan negara yang kaya akan kekayaan alamnya. Yang mana dari kepulauan Indonesia tersusun atas perairan. Sehingga mendapat keuntungan jika mampu mengoptimalkan usaha terhadap pengelolaan di wilayah perairan nusantara, menyebabkan masalah bagaimana mencari tenaga penggerak mula alternatif yang sifatnya reneable, berwawasan lingkungan dan ramah lingkungan. Dari permasalahan diatas maka diangkatlah judul tugas akhir tentang Kincir Kaki Angsa Model Turbin Ganda Untuk Mengoprasikan Generator AC Tiga Fasa Sistem Penguat Luar. Penulisan tugas akhir Tujuan dan Manfaat yang diinginkan penulis adalah: (1) Mengetahui langkah-langkah merancang kincir air kaki angsa model turbin ganda untuk menggerakkan generator AC tiga fasa 1,5 kw sistem penguat luar. (2) Mengetahui cara merakit kincir air kaki angsa model turbin ganda untuk menggerakkan generator AC tiga fasa 1,5 kw sistem penguat luar. (3) Mengetahui cara mengoprasikan kincir air kaki angsa model turbin ganda untuk menggerakkan generator AC tiga fasa 1,5 kw sistem penguat luar. (4) Mengetahui prosedur kerja kincir air kaki angsa model turbin ganda untuk menggerakkan generator AC tiga fasa 1,5 kw sistem penguat luar. (5)Mengetahui hasil uji kerja kincir air kaki angsa model turbin ganda untuk menggerakkan generator AC tiga fasa 1,5 kw sistem penguat luar. Dalam melaksanakan pengujian generator AC tiga fasa system penguat sendiri, dilakukan dua kali pengujian diantaranya pengujian dilapangan menggunakan kinci air kaki angsa dan dilaboratorium jurusan teknik elektro falkultas teknik universitas negeri malang. Hal ini dilakukan supaya mendapat hasil yang seakurat mungkin
Developing Learning Trajectory For Enhancing Students’ Relational Thinking
No full textAlgebra is part of Mathematics learning in Indonesian curriculum. It takes one half of the teaching hours in senior high school, and one third in junior high school. However, the learning trajectory of Algebra needs to be improved because teachers teach computational thinking by applying paper-and-pencil strategy combining with the concepts-operations-example-drilling approach. Mathematics textbooks do not give enough guidance for teachers to conduct good activities in the classroom to promote algebraic thinking especially in the primary schools.
To reach Indonesian Mathematics teaching goals, teachers should develop learning trajectories based on pedagogical and theoretical backgrounds. Teachers need to have knowledge of student’s developmental progressions and understanding of mathematics concepts and students’ thinking. Research shows that teachers’ knowledge of student’s mathematical development is related to their students’ achievement. In fostering a greater emphasis on algebraic thinking, teachers and textbooks need to work more closely together to develop a clearer learning trajectory. Having this algebraic thinking, students developed not only their own character of learning and thinking but also their attitude, attention and discipline.
Key Words: Learning Trajectory, Relational Thinkin
ANALISIS FAKTOR-FAKTOR YANG MEMPENGARUHI PEMBIAYAAN SYARIAH SEKTOR AGRIKULTUR PADA BANK UMUM SYARIAH (BUS) PERIODE 2015-2020
Get PDFAgricultural sector in Indonesia gives many contribution to the economy such as giving huge contribution towards PDB, becoming source of income for public, and being food producer for life necessities. However, agricultural sector still has some obstacles such as access to capital difficulties which are caused by majority has small business scale and banking perception that agricultural sector is as High Risk Industry. So that it is a need of support in Agricultural Sector, one of the available solutions is by syariah financing offered by Bank Umum Syariah. This study used quantitative study where the researcher would test the factors that influences the Agricultural Financing in Bank Umum Syariah (BUS). The sampling in this research was Non-Probability Sampling by using saturated sampling. The data used was quarterly secondary data from 2015 until 2020 which were obtained from Otoritas Jasa Keuangan website and Badan Pusat Statistik as the data resource analised by using Vector Autoregression (VAR) analysis tool with the help of E-Views 10 software. The result of the study showed that from the four independent variables there was only Produk Domestik Bruto variable which had a positive effect towards Agrucultural Financing. Whereas the Farmer’s Term of Trade Indices (NTP), Inflation and Non Performing Financing (NPF) had no effect on Agricultural Financing
Development of multimedia-based digital laboratory project center (CoLaP)
Get PDFSiregar, Tiur Malasari, Armanto, Dian, Frisnoiry, Suci. Development of multimedia-based digital laboratory project center (CoLaP). Journal of Education, Health and Sport. 2022;12(9):867-875. eISSN 2391-8306. DOI http://dx.doi.org/10.12775/JEHS.2022.12.09.100
https://apcz.umk.pl/JEHS/article/view/39916
https://zenodo.org/record/7096323
The journal has had 40 points in Ministry of Education and Science of Poland parametric evaluation. Annex to the announcement of the Minister of Education and Science of December 21, 2021. No. 32343.
Has a Journal's Unique Identifier: 201159. Scientific disciplines assigned: Physical Culture Sciences (Field of Medical sciences and health sciences); Health Sciences (Field of Medical Sciences and Health Sciences).
Punkty Ministerialne z 2019 - aktualny rok 40 punktów. Załącznik do komunikatu Ministra Edukacji i Nauki z dnia 21 grudnia 2021 r. Lp. 32343. Posiada Unikatowy Identyfikator Czasopisma: 201159.
Przypisane dyscypliny naukowe: Nauki o kulturze fizycznej (Dziedzina nauk medycznych i nauk o zdrowiu); Nauki o zdrowiu (Dziedzina nauk medycznych i nauk o zdrowiu).
© The Authors 2022;
This article is published with open access at Licensee Open Journal Systems of Nicolaus Copernicus University in Torun, Poland
Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author (s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non commercial license Share alike.
(http://creativecommons.org/licenses/by-nc-sa/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited.
The authors declare that there is no conflict of interests regarding the publication of this paper.
Received: 01.09.2022. Revised: 02.09.2022. Accepted: 16.09.2022.
DEVELOPMENT OF MULTIMEDIA-BASED DIGITAL LABORATORY PROJECT CENTER (CoLaP)
Tiur Malasari Siregar
State University of Medan
https://orcid.org/0000-0003-3731-2959
Dian Armanto
State University of Medan
https://orcid.org/0000-0003-3731-2959
Suci Frisnoiry
State University of Medan
https://orcid.org/0000-0001-9107-9751
Abstract
Designing Digital Center of Laboratory Project (CoLaP) a Multimedia-based can be used as a learning publication tool for students, lecturers, schools and other institutions and make the Mathematics Lab a source of information that can be a learning tool related to learning media, data processing and making learning media, Designing digital laboratory textbooks by elaborating several media, seeing feasibility, attractiveness and effectiveness of its use in Digital Center Of Laboratory Project (CoLaP) Multimedia-based. The method used in the process of making the Center of Laboratory Project (CoLaP) website is based on WDLC (Web Development Life Cycle) with 7 stages of development. Based on the research results, the creation of a digital library system for mathematics education which we call Digitalusing CoLaPWDLC. This digital CoLaP system produces a system that can be used by students, laboratory assistants, lecturers in viewing RPS and lecture contracts, viewing textbooks, viewing media, viewing lecture schedules or lab use, Lab activities, laboratory assistants can validate student data, process student data, upload the schedule for the use of the lab, the schedule of lecturers and students on duty by logging in first into the system. Based on the test results given that students and lecturers respond well to the creation of the Digital CoLaP Web system. Students and lecturers find it helpful to make it easier to carry out the lecture process, starting with the lecture schedule, laboratory lecture tools are available.
Keywords: Center of Laboratory Project (CoLaP), Digital, Multimedi
In my beginning is my end
No full textAll life is sustained by what has been before. The atoms of any living organism or non-living entity have been recycled innumerable times and in countless different forms of biotic and abiotic matter, including the biochemical characteristics of the genome of LUCA, the presumed last universal common ancestor of all living organisms, dating back to over four billion years ago (Moody et al., 2024). Since then, biogeochemical cycles have reiterated this process, constantly producing, disrupting and newly producing a potentially infinite range of different biospheric equilibria and the resulting ecosystems, ecological communities and populations of species that ensue.
In this respect, what is often referred to as the Anthropocene is no more than a particular example of this ongoing succession of change(s). What most characterizes it, however, is the tendency of one species, Homo sapiens, to continually disrupt existing balance(s) through both the strength and the velocity of its impacts, in terms of relentless exponential demographic growth, plundering physical resources to an extent that far exceeds their natural replenishment, exploiting indiscriminately living organisms – including fellow human beings – even to the point of rendering them at risk of extinction, destroying habitats through urbanization and expansion of agricultural land, so as to cause a drastic loss of biodiversity, accelerating production and consumption chains that massively pollute and generate volumes of waste that overwhelm natural recycling processes and degrade environments, thereby threatening the planetary health balance on which our wellbeing depends, together with that of countless other species. All this is then infinitely exacerbated by constantly waging intraspecific war at increasingly devastating levels, and consequential mass destruction of habitats and ecosystems, together with wholesale suffering and death for human and all life.
The essence of the question can be seen in terms of the laws of physics. Power (P) is the product of force (F) and speed (s). Power can also be expressed as the ratio of work (W) to time (t). Doing a given amount of work in a shorter time means increased power. When human time taken to destroy balance is shorter than Nature time needed to recover, the outcome is unsustainable. This is further exacerbated in those areas where intensity - defined as the ratio of power to surface area - is at its maximum, thereby straining to breaking point an ecosystem's carrying capacity.
Such human hubris, compounded by the unprecedented power certain technologies and systems have conferred on modern societies, without corresponding governance mechanisms able to manage their consequences, means that we have largely continued to ignore the fact that resource ceilings and carrying capacities cannot be ceaselessly exceeded and human-inflicted devastation relentlessly pursued without dramatic consequences. If as a collective species we will be able to recognise this before it is too late, such recognition necessarily means we must exit from our dominant Western anthropocentric vision and reconsider our existence in terms of its beginnings and ends at various levels and in terms of the material and immaterial processes that characterize our trajectories. Each one of the papers in this issue can be seen as explorations in that direction.
In terms of material processes involving beginings and ends, in recent years much attention has been paid to the concept of Circular Economy (CE). In “Bridging ESG and the Circular Economy: Advancing corporate sustainability through the updated R-hierarchy and Circularity Scoring Model” Kopnina et al. offer an innovative vision for CE. They explore how CE and Environmental, Social, and Governance (ESG) frameworks can intersect by integrating relevant theories and practical approaches to enhance organisational alignment and accountability, in particular regarding the environmental dimension. They propose an updated 10-R framework for qualitative reporting, incorporating new dimensions such as Regeneration (e.g., Rewilding and Restoration) to reflect biodiversity considerations, together with the Circularity Scoring Model (CSM) to quantitively assess organisational CE performance concerning ESG objectives, and report findings suggesting that embedding CE principles into accounting and investment practices can highlight opportunities for improvement in key areas of sustainability.
While Kopnina et al. present a macro-framework for CE, two following papers offer micro-visions for circularity in waste management. In “Cocoa shell bioplastic: A circular path towards sustainability” Burgos Bravo et al. investigat the potential of cocoa shells as feedstock for bioplastic synthesis. They compare two treatments for filtration, solubility, elongation, resistance, moisture content, and biodegradability and conclude that in both cases results show cocoa shells can offer a sustainable and environmentally friendly resource for bioplastic production, contributing to a circular economy and reducing agricultural waste. In “Enhancing compost quality with bacillus bacteria: Leveraging cocoa shells and banana pseudostems” Basurto et al. examine different treatments to evaluate Bacillus albus and Bacillus wiedmannii for composting banana pseudostem and cocoa shell waste. Their results show the important role of composting in recycling and reducing the polluting impact of agricultural waste.
Higher education clearly has a key role to play in creating the necessary awareness of the paradigmatic changes necessary for promoting more sustainable human trajectories. In “Assessing campus sustainability practices. A systematic literature review” Putra & Ulkhaq set out to evaluate sustainability practices in Higher Education Instiutions (HEIs), focusing on assessment frameworks and methodologies. Their findings reveal the adoption of diverse frameworks, together with the integration of sustainability principles into curricula, campus operations, and research. The authors show challenges such as resource constraints, limited stakeholder awareness, and infrastructural barriers hinder effective implementation and highlight the need for comprehensive, localized assessment tools to enhance HEIs’ contributions to promoting sustainability.
Attention has also been increasingly directed to indigenous knowledge and local wisdom and how this can be related to understanding mutually beneficial relationships between human populations and population of other species within ecological communities. In “Leveraging selected Local Wisdom Species in developing peatland restoration in South Sumatra, Indonesia” Armanto et al. examine applying Local Wisdom Species (LWS) to involve rural communities in peatland restoration. They argue that if LWS disappear due to pressure from industrial plantations, rural communities will be controlled by the international trade system, which threatens their rural lifestyles, and they will be pushed out of the peatlands where they have lived for hundreds of years and propose rural community-based peatlands restoration based on four approaches that focus on decentralization, conservation, protection and optimization.
Local wisdom can be seen as the outcome of living in balance with all the biotic and abiotic components of one’s environment, and this also been linked with a growing recognition of the importance of a relationship with nature that enhances health promotion. In “Mountain Therapy as a support in breast cancer treatment: A pilot study in Southern Italy” Piattelli et al. illustrate research on Mountain Therapy (MT) as a therapeutic-rehabilitative and/or socio-educational methodological approach aimed at the secondary prevention, treatment and rehabilitation of people with different pathologies. The main results show that the patient’s quality of life improved after the MT approach, reducing stress and anxiety levels, thereby confirming the regenerative capacity of the natural environment in people suffering from a disabling disease, monitored through the assessment of psycho-physical parameters, helping to improve their quality of life and reduce hospitalisations.
The nature of and the relationship between human activity, urban expansion and various kinds of natural habitats, including forests, is a key question in much sustainability literature. In “Sustainable approach for socio-ecological development of urban areas” Chhachhiya et al. explore the multifaceted dimensions of resilient and inclusive urban planning, focusing on its significance amidst urban expansion and socio-economic disparities affecting the corresponding ecologically sensitive areas. The authors examine the theoretical underpinnings and practical applications of resilience and inclusivity within urban planning frameworks. They highlight the importance of integrating eco-sensitive approaches, adaptive strategies, and participatory mechanisms to foster resilience and inclusiveness in urban development processes. In “The effect of tree harvesting rights on investment in tree growing and promotion of sustainable tree conservation practices by private land holders in Kenya” Chisika & Yeom use a case study approach and document content analysis to examine the impact of assigning tree harvesting rights on sustainable tree growing. Their reslts show that, while assigning tree-growing rights has had positive impacts, including ecological and economic benefits, it has also led to negative sustainability outcomes. They argue that developing a stable legal framework, improving market access, and offering financial incentives are crucial for supporting sustainable forestry on private lands.
New visions are always built on the basis of current and previous visions. This involves understanding how narratives, discourses and dialogues evolve and can be unconsciously subscribed to or questioned and thereby changed. In “Terror Management Theory and Grand Metanarratives: The search for a Consilient Ethics of Conscious Limitedness for the Ecological Transition” Sanniti et al. argue that it is essential to examine dominant ethical systems and whether they can be redirected to encourage sustainable behaviours. They draw on Terror Management Theory (TMT), which suggests that cultural systems evolve in response to humans' awareness of their biological limitations. They maintain that both individual and collective actions rely on a shared system of beliefs, or grand-metanarratives, that give meaning to experiences. Through examining the disembodiment metanarrative in the Western Judeo-Christian paradigm as central to the expansion of global beliefs, they propose a shift towards more ontologically open and epistemologically pluralist metanarratives that lay the foundation for the emergence of global and localized ecological consciousness.
In “Reinterpreting intercultural dialogue for sustainability in the Anthropocene era” Skrefsrud explores the concept of intercultural dialogue in an era shaped by significant human impact on the planet to show how an Anthropocene narrative can offer a critical and imaginative reassessment of that dialogue and extend its scope beyond traditional anthropocentric perspectives. The author argues the need for critical analysis within Anthropocene discourse, situating intercultural dialogue within an ecological context, and challenging dominant narratives, so as to amplify marginalized voices and foster more just and sustainable ways of coexisting.
In “The representation of nature in a political speech in promoting ‘Indonesia Maju’” Max et al. adopt an ecolinguistics approach to examine how topics on nature in political discourse and speeches are strategic not only to gain people’s attention but also to hide agendas. Their research aims Systemic Functional Grammar’s transitivity and Greimas’ actantial analysis. The research object is a speech which promotes the notion of “Advanced Indonesia”. Linguistically, the speech emphasizes green economy but neglects indigenous people and environmental concerns. Through e actantial analysis, the authors argue that in promoting “Advanced Indonesia” as the goal the speech neglects the nature it purports to promote by maintaining anthropocentric perspectives of the subject.
In “How can satirical fables offer us a vision for sustainability?”, a book review of Wild Wise Weird by Quan-Hoang Vuong, Nguyen states that the book fosters readers’ awareness, self-reflection, informational connectivity, and even inspires them to confront stupidity to uncover wisdom. The reviewer believes that it has the potential to resonate with readers, especially younger ones, embedding ecological sustainability in their humanistic values through the humor, vibrancy, and absurdity of its bird characters, as well as the wisdom woven throughout.
In “A vision for just and fair transitions toward a carbon-free world”, a book review of A just transition for all: Workers and communities for a carbon-free future by J. Mijin Cha, Pham & Ho state that technological visionaries often paint a future powered by clean energy, yet these optimistic visions tend to overlook the messy socio-political realities of such transitions. They argue that the book they review illustrates how there is a vast difference between a so-called ‘just’ transition and one that is genuinely just and offers a much-needed, thought-provoking, and meticulously documented exploration of how political and business leaders can ensure fairness and justice for all stakeholders—especially vulnerable workers and their communities—as the world attempts a shift toward a carbon-free future.
The title of this editorial is a line from the poem “East Coker” by T.S. Eliot. In a companion poem in the volume Four Quartets (1943), “Little Gidding”, Eliot affirms:
What we call the beginning is often the end
And to make an end is to make a beginning.
The end is where we start from.
Ends can be points of arrival from which to derive new beginnings as points of departure. Ends can also be defined in terms of purpose and scope, to rethink trajectories and move from an anthropocentric to an ecocentric vision and begin anew the human enterprise. From another perspective, ends can also be the occasion for death and even extinction, something both auto-inflicted and etero-inflicted on other species by Homo sapiens. As Edward Said (1975) puts it: “[…] beginning is basically an activity which ultimately implies return and repetition rather than simple linear accomplishment”. If we continue to put our faith in a linear pathway of supposed progress based on economic growth and technological advance, then death and extinction will likely be our only accomplishment.
References
Eliot, T.S. (1943). Four Quartets. Harcourt.
Moody et al. (2024). The nature of the last universal common ancestor and its impact on the early Earth system. Nature Ecology and Evolution 8, 1654–1666. https://doi.org/10.1038/s41559-024-02461-1
Said, E. (1975). Beginnings. Intention and Method. Johns Hopkins University Press
Geochemical dynamic in high andean Andisols, case study, Las Palmas microbasin
No full textIlustraciones, mapasThe dynamics of water in basins is regulated by its interaction with soil moisture, vegetation, temperature and precipitation among other factors. The changes in these interactions can be used as tools for the analysis of hydrological processes and generate ecosystem management proposals. The soil is a key element in the water cycle, which regulates most of the processes that take place there, but the growth of anthropogenic agro-industrial activities has brought with it the alteration of ecosystems and a significant deterioration in the quality of surface and underground waters, thus the use of nitrogenous fertilizers has been one of the factors that has led to the progressive pollution of water quality, generating a risk to human health, from the chemical species associated with these fertilizers, the contaminant that requires the most attention is nitrates.
In order to analyze the influence of pollutants such as nitrate on water quality in a basin system where andisol soils are present, the study area was divided into four areas of interest (potato cultivation, pastures, forests and the channel of Las Palmas brook), in the land-use-zones potato crops, grasslands and forests, two experimental plots with sufficient hydrometeorological instruments were used to obtain data on precipitation, surface runoff, infiltration at 0,20 and 0,50 m deep, in addition to a physicochemical analysis of the waters of each of these systems and an analysis of the dynamics of iron in Andisol soils as an indicator of ion mobility. In the interest to relate the hydrological processes based on the chemical species studied, multivariate statistical methods were applied such as the variant analysis of three factors and principal components (PCA), together with linear regressions (ANCOVA); with the purpose of generating information to design better management strategies for the different land uses and mitigate the impacts on bodies of water.
The results found show a lower storage of water in the soil for the forest soils (gallery or riparian forest) due to the high interception by the covers; while soils under crops (Solanum Tuberosum) and grazing (Pennisetum Clandestinum) have high moisture retention. Given the high availability of water in these ecosystems, conditions associated with anaerobic processes prevail in wet seasons and aerobic processes in dry seasons, where water flows in wet seasons have concentrations of less than 50 mg/L NO3-, which does not represent a risk to human health, in dry seasons these concentrations can be exceeded, especially in the forest area with concentrations up to 139 ml/L NO3- (June). The high moisture content of the soil, high rainfall, high infiltration (83-99%) and low runoff (<1%), as well as acidity and a redox potential of less than 450 mV, condition the mobility of contaminants in these environments favoring the resilience of these ecosystems.The dynamics of water in basins is regulated by its interaction with soil moisture, vegetation, temperature and precipitation among other factors. The changes in these interactions can be used as tools for the analysis of hydrological processes and generate ecosystem management proposals. The soil is a key element in the water cycle, which regulates most of the processes that take place there, but the growth of anthropogenic agro-industrial activities has brought with it the alteration of ecosystems and a significant deterioration in the quality of surface and underground waters, thus the use of nitrogenous fertilizers has been one of the factors that has led to the progressive pollution of water quality, generating a risk to human health, from the chemical species associated with these fertilizers, the contaminant that requires the most attention is nitrates. In order to analyze the influence of pollutants such as nitrate on water quality in a basin system where andisol soils are present, the study area was divided into four areas of interest (potato cultivation, pastures, forests and the channel of Las Palmas brook), in the land-use-zones potato crops, grasslands and forests, two experimental plots with sufficient hydrometeorological instruments were used to obtain data on precipitation, surface runoff, infiltration at 0,20 and 0,50 m deep, in addition to a physicochemical analysis of the waters of each of these systems and an analysis of the dynamics of iron in Andisol soils as an indicator of ion mobility. In the interest to relate the hydrological processes based on the chemical species studied, multivariate statistical methods were applied such as the variant analysis of three factors and principal components (PCA), together with linear regressions (ANCOVA); with the purpose of generating information to design better management strategies for the different land uses and mitigate the impacts on bodies of water. The results found show a lower storage of water in the soil for the forest soils (gallery or riparian forest) due to the high interception by the covers; while soils under crops (Solanum Tuberosum) and grazing (Pennisetum Clandestinum) have high moisture retention. Given the high availability of water in these ecosystems, conditions associated with anaerobic processes prevail in wet seasons and aerobic processes in dry seasons, where water flows in wet seasons have concentrations of less than 50 mg/L NO3-, which does not represent a risk to human health, in dry seasons these concentrations can be exceeded, especially in the forest area with concentrations up to 139 ml/L NO3- (June). The high moisture content of the soil, high rainfall, high infiltration (83-99%) and low runoff (<1%), as well as acidity and a redox potential of less than 450 mV, condition the mobility of contaminants in these environments favoring the resilience of these ecosystems.La dinámica del agua en las cuencas está regulada por su interacción con la humedad del suelo, la vegetación, la temperatura y la precipitación, entre otros factores. Los cambios en estas interacciones pueden ser utilizadas como herramientas para el análisis de los procesos hidrológicos y generar propuestas de gestión de los ecosistemas. El suelo es un elemento clave en el ciclo del agua, que regula la mayoría de procesos que allí se desarrollan, pero el crecimiento de actividades antropogénicas agroindustriales ha traído consigo la alteración de los ecosistemas y un deterioro marcado de la calidad de las aguas superficiales y subterráneas, así el uso de fertilizantes nitrogenados ha sido de los factores que ha llevado a la contaminación progresiva de la calidad del agua generando un riesgo para la salud humana, de las especies químicas asocias a estos fertilizantes, el contaminante que mayor atención tiene son los nitratos. Con el fin de analizar la influencia de contaminantes como el nitrato en la calidad de agua en un sistema cuenca donde están presenten los suelos andisoles, se realizó una división de la zona de estudio en cuatro áreas de interés (cultivo de papa, pastizales, bosques y el cauce de la quebrada Las Palmas), en las zonas de uso del suelo cultivos de papa, pastizales y bosques, se trabajó con dos parcelas experimentales, con los instrumentos hidrometeorológicos suficientes para la obtención de datos de precipitación, escorrentía superficial, infiltración a 0,20 y 0,50 m de profundidad, además de un análisis fisicoquímico de las aguas de cada uno de estos sistemas y un análisis de la de dinámica del hierro en suelos Andisoles como indicador de movilidad de iones. Para poder relacionar los procesos hidrológicos en función de las especies químicas estudiadas, se aplicaron métodos estadístico multivariantes, como análisis de varianza de tres factores y componentes principales (PCA), junto a regresiones lineales (ANCOVA). con el propósito de generar información para diseñar mejores estrategias del manejo de los diferentes usos del suelo y mitigar los impactos a los cuerpos de agua. Los resultados encontrados muestran un menor almacenamiento de agua en el suelo para suelos forestales (bosque de galería o ripario) debido a la alta interceptación por parte de las coberturas; mientras los suelos bajo cultivos de papa (Solanum tuberosum) y pastoreo (Pennisetum clandestinum) tienen una alta retención de humedad. Dada la alta disponibilidad de agua en estos ecosistemas prevalecen las condiciones asociadas a procesos anaeróbicos en épocas húmedas y procesos aeróbicos en épocas secas, en donde los flujos de agua en estaciones húmedas tienen concentraciones inferiores a 50 mg/L NO3- , lo cual no representa un riesgo para la salud humana, en épocas secas se pueden superar estas concentraciones especialmente en la zona de bosques con concentraciones de hasta 139 mg/L NO3- (junio). El alto contenido de humedad del suelo, las altas precipitaciones, alta infiltración (83 - 99 %) y la baja escorrentía (< 1 %), así como la acidez y un potencial redox inferior a los 450 mV, condicionan la movilidad de contaminantes en estos ambientes favoreciendo la resiliencia de estos ecosistemas. (Texto tomado de la fuente)MaestríaMaestría en Ingeniería- Recursos HidráulicosHidrogeoquímicaÁrea Curricular de Medio Ambient
