2 research outputs found
Optimized Evaluations of Irrigation Profits and Balance of Irrigation Water Demand and Supply Under Climate Change
No full textOptimizing irrigation profit is essential for enhancing agricultural productivity and ensuring sustainable water resource management, especially under the uncertainties caused by climate variability. It signifies that maximizing irrigation profits has become the primary consideration of current agricultural irrigation systems. By discussing the change in irrigation profits with irrigation fraction f, which represents the proportion of irrigated farmland per unit area of cultivated land, a new method of qualitative diagnosis of irrigation supply and demand balance was proposed by means of the optimal irrigation fraction f0 corresponding to the objective function yf and the correlation coefficient ρ between irrigation water demand anomalies D^ and irrigation water withdrawal anomalies I^ (ρD^,I^=0). It will serve as a new attempt to optimize irrigation profits. We argue that the optimal objective function yf0 represents the state of equilibrium of irrigation supply and demand. This study proposes a reverse optimization idea, which includes two comparison methods, to estimate the comprehensively optimal irrigation fraction f0 that maximizes irrigation profits and irrigation profit per unit area while minimizing risks associated with climatic anomalies. By demonstrating that f0 performs exceptionally well in meeting the objectives of maximizing irrigation profits and minimizing risks across various climatic scenarios, we suggest a robust method for optimizing irrigation profits, which simply calculates ρD^,I^f=0 because ρD^,I^ is the function of f. Since f0 could capture the optimal solution to the greatest extent. It can serve as a simple and effective solution to determine the optimal objective function yf0 and diagnose the state of balance between irrigation water demand and supply. This method offers practical implications for water resource management and agricultural planning in the face of climate change
Panta Rhei: a decade of progress in research on change in hydrology and society
No full textTo better understand the increasing human impact on the water cycle and the feedbacks betweenhydrology and society, the International Association of Hydrological Sciences (IAHS) organized thescientific decade “Panta Rhei – Everything Flows: Change in hydrology and society” (2013–2022). A keyfinding is the need to use integrated approaches to assess the co-evolution of human–water systems inorder to avoid unintended consequences of human interventions over long periods of time. Additionally,substantial progress has been made in leveraging new data sources on human behaviour, e.g. throughtext mining of social media posts. Much has been learned about detecting hydrological changes andattributing them to their drivers, e.g. quantifying climate effects on floods. To achieve further progress,we recommend broadening the understanding, the discipline and training activities, while at the sametime pursuing synthesis by focusing on key themes, developing innovative approaches and findingsustainable solutions to the world’s water problems
