Tropical Wetland Journal (TWJ)
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Tourism Development Strategy of Mangrove Forest in Langadai Village, Kotabaru
Full text linkThe basic concept of tourism development strategy mangrove forest is reviewing the state of observation in the area of mangrove forests, perceptions and preferences of society and local government, and the use of SWOT analysis. This study aims to determine the development strategy of mangrove forest tour in the village Langadai Kelumpang Hilir Subdistrict, so mangrove well then expected to implement development programs and the development of an integrated strategy between the conservation of natural resouces with economic development in a sustainable society. The application of the concept of travel in the area of mangrove forest ecosystems in general is expected to reduce the rate of destruction of these areas by the public. Processing method used is the analysis of the potensial landscape and strategy development SWOT analysis. Analysis of the data elements of the landscape each focal point of the model pengharkatan done that is by scoring according to the criteria assessment landscape elements that have been modified. While the SWOT analysis is a technique for identifying problems based on potential or strengths and weaknesses to address and respond to the opportunities and threats. So that the analysis results can be used as a basis for the development of mangrove forest tour in the village Langadai Kelumpang Hilir subdistrict in the future. Based on the results of the assessment landscape mangrove forest tour in the village Langadai Kelumpang Hilir Subdistrict is in the range of 19-33 which means to have a high quality, so it has the potential to be developed as the natural attractions. Based on the results of this study resulted in several recommendations that include: Completing the supporting infrastructure of natural traveled activities such as: roads, bridges, gazebo, fishing, sanitary facilities, public toilets and others. Promotion to the public both in the region and outside the region. The government should make the rules tight areas in the preservation of nature and fully supported by the community. Improving the quality of management of natural attractions integrated manner
Analysis of Water Quality Status Based on Domestic Waste Parameters by Using Pollutant Index Method at Tabuk River, Central Kalimantan Province
Full text linkThe study aims to analyze the quality of water at Tabuk River Status by using pollution index method and domestic waste pollution impact to human health. The experiment was conducted in Tabuk River at Barito Selatan Regency Central Kalimantan Province. The samples of water with physical, chemical and biological parameters were taken at 3 points in the morning in the withdraw and flood. After wards, they were compared with the standard quality of water class II based on Government Regulation Number 82 of 2001 and domestic waste pollution impact to human health description. The results of study revealed that the water quality of Tabuk River exceeding criteria based on BOD at 48 mg/L in the withdraw and 22,52 mg/L in the flood, COD at 61,4 mg/L in the withdraw and 47,47 mg/L in the flood, TSS at 338,3 mg/L in the withdraw and 157,4 mg/L in the flood and Faecal Coliform at ≥ 1898 MPN. Whereas based on the index value of pollutants, Tabuk River by the light polluted status of 3,33-3,97, except downstream of withdrawing is medium (pollution index 5,2). The domestic waste pollution negative impact to human health. Increased faecal coliform in Tabuk River at ≥1898 jml/100 mL (MPN) and 58,33% society coastal river area have diarrhea and itch
THE EFFECT OF MASS OF COAL FLY ASH-CHITOSAN COMPOSITE PELLETS MODIFIED WITH GLUTARALDEHYDE ON THE ADSORPTION OF MERCURY IN SOLUTION
Full text linkFly ash can be used and utilized as an adsorbent because it is cheap and effective to adsorb waste in the aquatic environment. Hg also known as Mercury is a carciogenic heavy metal and potentially threatens human health at very low concentrations. In this study, fly ash was applied as the adsorbent for Hg2+ in the form of chitosan-fly ash composite pellet and was cross-linked with glutaraldehyde in order to know how much the mass of pellets that can be used to lower the concentration of Hg2+ in solution. The results showed that the fly ash can be compositated with chitosan gel after going through the process of physical-chemical activation so that it can be formed into adsorbent pellets/granules. The optimum condition was obtained from adsorbent pellets of fly ash-chitosan composite crosslinked with glutaraldehyde after contacted with a solution containing Hg2+ with the pellet mass of 3 g
CONTRIBUTION OF FORESTRY SUBSECTOR TO ECONOMIC DEVELOPMENT OF KOTAWARINGIN BARAT REGENCY
Full text linkForest as the financial capital for development has important roles in economic development of Kotawaringin Barat Regency. Commonly, forest is a large area of land where flora (trees) and fauna (animals) exist. It can produce woods and other products for human consumption (production function), regulate the water system for human life, prevent flooding and sea water intrusion (protection function), and preserve many species of plants and animals and ecosystem (conservation function). Economically, forest as the source of woods, rattans and other products provided foreign exchange for the country during 1980-1990; this case placed the subsector of forestry as one of the prime movers in Indonesia’s economy. The purpose of this research was to analyze the extent of the foresty’s contribution to the economic development and social welfare in Kotawaringin Barat Regency. The research methodology was conducted by: a) interview, b) observation / field surveys and c) documentation (supporting data). The results showed that the contribution of forestry subsector in the economic development and social welfare of Kotawaringin Barat reached IDR 38.6 billion in 2011
THE POTENTIAL OF SPODOPTERA PECTINICORNIS IN CONTROLLING WATER LETTUCE (Pistia stratiotes) IN FIELD
Full text linkSpodoptera pectinicornis is a biological control agent that has a great potential to control water lettuce weeds. Its existence in nature however is still limited, so a mass propagation is needed by rearing S. pectinicornis imagoes to produce eggs and to hatch them into larvae of 4 days old. The 4-year larvae were then released by putting water lettuces that contained active larvae into the target area. Observation results on the percentage of damage in the watershed location for 5 times of observation consecutively was 25%, 50%, 50%, 75% and 90%. The magnitude of damage showed that S. pectinicornis was able to adapt well, so it could perform eating activities and cause damage to the water lettuces. Meanwhile, at the release site of rice field, the percentage of damage was 0%, 25%, 35%, 25% and 10%. The downward trend in the level of S. pectinicornis attacks was due to its inability to keep pace with the growth and development of water lettuces. High level of rainfall caused the water lettuces to increase its size and the number of its tillers so that they could colonize these waters. The fact that S. pectinicornis still has the ability to destroy the water lettuces gives great hope to the control efforts. However, thorough evaluation and assessment are required on all aspects, such as the biological control agents, weed targets, organisms associated with them, and the state of the environment so as to minimize the possibility of failure in the field
ANALYSIS OF PROFIT FUNCTION AND RETURNS TO SCALE OF RICE FARMING IN TIDAL AND FRESHWATER SWAMPLANDS IN SOUTH KALIMANTAN
Full text linkThe purpose of this study was to estimate the production and profit function by farmers and to analyze the relative economic efficiency of rice farming in two typologies of wetland, tidal swampland and freshwater swampland. The analysis showed that the production facilities in the study area were very influential on the rice farming profit, so an increase in the high price of production facility would lead to a decrease in profit, which in turn would lower the level of farmers’ welfare. Under optimal conditions where maximum profit was reached, the effects of variable input prices and the input number remained significant except for the value of the equipment used. Based on the value of the coefficient function of fertilizer demand, pesticide and labor were inelastic towards the price while the seed input was elastic. Rice farming in the study area had decreasing returns to scale. It indicated that the increase in inputs was higher than the increase in returns
THE LIFE TABLE OF Spodoptera pectinicornis Hampson AS BIOLOGICAL CONTROL AGENT OF WATER LETTUCE (Pistia stratiotes L.) WEED
Full text linkThe table of life can provide information on birth (natality), death (mortality) and the opportunity to breed, so it can be used as a parameter of the behavior of population development.The purpose of this study was to determine the calculation of life table of S. pectinicornis Hampson as biological control agent of water lettuce (P. stratiotes) weed.The table of life is done by observing survival ability, mortality and fecundity of S. pectinicornis of a cohort of 300 eggs by looking at all the stages from egg, larva, pupa, and imago, and fecundity of female imago per day. The research was conducted in a condition of unlimited food resources and environment free of natural enemies. Parameters observed were gross reproductive rate (GRR), net reproductive rate (Ro), average of generation time (T), intrinsic rate of growth (r), and limited rate of growth (λ). The research result of the life table calculation showed that GRR value was 350.29, the value of net reproductive rate (Ro) was 19.59 descendants, the average of generation time (T) was 29.47 days, the value of intrinsic rate of accretion (r) was 0.10 and the value of limited rate of accretion (λ) was 1.11
NALYSIS OF FACTORS CAUSE DELAY PROJECT CONSTRUCTION BRIDGE IN THE CITY OF BANJARMASIN
Full text linkWith an area of 98.46 km2 whose territory is separated by rivers, to increase economic growth Banjarmasin City has done infrastructure development in the field of transportation of roads and bridges are quite significant. But in the process of implementation, there is often a delay in the bridge construction project. This can lead to problems within the scope of the project itself. So it is necessary to do further research to know the cause of the bridge construction project delay. This research is conducted qualitatively and quantitatively. The causative factors obtained from the literature were distributed to contractors through questionnaires to see perceptions of contractors and concessions. The data of the questionnaire were analyzed by using validity test, reliability, and descriptive statistical analysis with Pearson Moment (Bivariate Pearson) method assisted by ms. excel to get the factors causing the delay. Then the delay factors will be tested through interviews with stakeholders in the three bridge samples. Based on the results of data processing analysis, it can be concluded that the factors that greatly affect the bridge construction project delays are analyzed by descriptive analysis of material arrival delay, material arrival delay, damage due to negligence of work, and work that does not comply with operational standards
A MATHEMATIC MODEL OF TWO MUTUALLY INTERACTING SPECIES WITH MORTALITY RATE FOR THE SECOND SPECIES
Full text linkOne of the interactions that occur withinthe ecosystem is the interaction of mutualism. Such mutualism interactions can be modeled into mathematical models. Reddy (2011) study suggests a model of two mutually interacting species that assumes that each species can live without its mutualism partner. In fact, not all mutual species survive without their mutualism pairs. If it is assumed that the second species lives without its mutualism partner, the first species, then the natural growth rate of the second species population will decrease (the mortality rate). The purpose of this research is to explain the model of two mutually interacting species with mortality rate for the second species, to determine the equilibrium point and the type of stability, and to simulate them with several parameters. This research was done by way of literature studies. The result of this research is the model of two mutually interacting species with mortality rate for second species modeled using Nonlinear Differential Equation System. In the model, it was obtained 3 (three) points of equilibrium, with each type and type of stability investigated. Next up from the stability, model simulations were done. Based on several simulations conducted can be seen the value of parameters and initial values affect the population growth of both species. The interaction model of two mutual species will be stable if the first species survive and the second species over time will be extinct
PROSPECT OF THE COMMON CARP (Cyprinus carpio L.) CAGE CULTURE IN MURUNG RAYA REGENCY
Full text linkThis study aimed to (1) find out the water quality parameters of the river where the common carp cage cultures are located at Murung Raya Regency, either adjacent or far from the gold mine site, including water temperatures, pH, dissolved oxygen, carbon dioxide, ammonia and water clarity; (2) to compare the common carp cage culture profits in the river either adjacent or far from the gold mine sites; and (3) to determine the common carp cage culture development strategies at Murung Raya Regency. This study was carried out in Murung Raya Regency, Central Kalimantan, with the common carp cage farmers at Muara Supoi and Muara Bumban Villages, Murung Regency as the object. The collected data were primary and secondary data. The data analysis used were descriptive analysis, t statistical test, and a SWOT analysis. The results of the study showed that condition of the water where the common carp cage cultures are located at Murung Raya Regency, either adjacent or far from the gold mine sites, still in the range of the quality standards required, namely the temperature of 29.73 - 29.78oC; water clarity of 10 - 11 cm; pH of 6.58 - 6.65; dissolved oxygen of 6.11 - 6.73 mg /l; carbon dioxide of 0.02 - 0.03 mg/l; and ammonia of 0.02 mg/l, so that the common carp cage culture activities at Murung Raya Regency were still very feasible to carried on. The average profits of the common carp cage cultures, either adjacent or far from the gold mine sites, were relatively similar, with the t statistical test result showed that the profits at both locations did not differ significantly at 95% test level. The development strategy of common carp cage cultures at Murung Raya Regency was in quadrant II or S - T, namely utilizing the strengths to overcome the threats. It was implemented by establishing two alternative solutions, namely (1) by taking advantage from the fish culture development programs and supports by the government; and (2) optimized the development function of the of seed center for supplying the high-quality seeds. One of them was by utilizing the special allocation fund (Dana Alokasi Khusus - DAK) from the Ministry of Marine Affairs and Fisheries