نتایج جستجو برای: irrigation dam
تعداد نتایج: 55036 فیلتر نتایج به سال:
The damming of a river causes dangerous consequences on structure of the environment downstream of the dam, modifying the sediment composition, which impose major adjustments in longitudinal distribution of benthic community. The construction of Engenheiro Sérgio Motta Dam in the Upper Paraná River has caused impacts on the aquatic communities, which are not yet fully known. This work aimed to ...
China's historiographical traditions tell of the successful control of a Great Flood leading to the establishment of the Xia dynasty and the beginning of civilization. However, the historicity of the flood and Xia remain controversial. Here, we reconstruct an earthquake-induced landslide dam outburst flood on the Yellow River about 1920 BCE that ranks as one of the largest freshwater floods of ...
importance of farmers' participation in system design and management has been emphasized in various fields. motivation is thought as the most important factor affecting farmers' participation in agricultural development programs. many theories have been postulated in motivation field and abundant research projects accomplished in this area. mcmillion’s theory was recognized as appropr...
Abstract Global hydro-climatic trends are ambiguous, challenging the management of water resources. This challenge is addressed in current study by investigating impacts and upstream on hydropower generation at Bagré dam. Modified Mann–Kendall trend test, Standard Normal Homogeneity Test Pettit test were applied to some selected variables for change year detection, whereas relationship between ...
Considering the impacts of agricultural runoff, domestic and industrial effluents on quality many dams rivers as cited in literature, a physico-chemical study regarding water assessment Ghunghuta dam has been carried out to indicate irrigation suitability water. In present study, parameters like pH, EC, TDS, TH, Ca, Mg, Na, K, carbonate bicarbonate were estimated evaluate sodium percentage (% N...
Abstract. The streamflow of the Yellow River (YR) is strongly affected by human activities like irrigation and dam operation. Many attribution studies have focused on long-term trends streamflows, yet contributions these anthropogenic factors to fluctuations not been well quantified with fully mechanistic models. This study aims (1) demonstrate whether global land surface model ORCHIDEE (ORgani...
Dam breaks of landslide dams are always accompanied by large numbers of casualties, a large loss of property, and negative influences on the downstream ecology and environment. This study uses the Jiadanwan landslide dam, created by the Wenchuan earthquake, as a case study example. Several laboratory experiments are carried out to analyse the dam-break mechanism of the landslide dam. The differ...
The design of a gravity dam is performed through an interactive process involving a preliminary layout of the structure followed by a stability and stress analysis. This study presents a method to define the optimal top width of gravity dam with genetic algorithm. To solve the optimization task (minimize the cost of the dam), an optimization routine based on genetic algorithms (GAs) was impleme...
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