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Based on the researches of water use efficiency in China and other countries, a water resource utilization efficiency assessment index system is proposed, which includes six kinds such as water use per 10,000 Yuan of GDP, removal variability of agriculture water resources utilization efficiency, per 10,000 Yuan of added industrial output value etc. By the cluster analysis of indicator data, it adopted...
In the Dabie Mountains of the lower Yangtze basin, China, soil loss reduction has been deemed as important as flood control after the 1998 flood, which caused great damage to the area and its residents. After 2000 year, a project of Reforestation in cultivated land at slope was started. In this study, field observations of water and sediment discharges were carried out on USLE (Universal Soil Loss...
In order to understand the variation of turbidity in the water column of Liuxihe reservoir, the relations of turbidity and hydrology status is analyzed, which shows a high relationship between them. A model about total suspended matter (TSM) is proposed to study TSM and related hydrology factors (inflow and outflow volume) quantitatively. In order to make the model close to the real state, the particle...
Aimed at the problem of water shortage for irrigation while encountering the extra draught year in Yinchuan plain, by using hydrogeological numerical model, this paper proposed a way of improving the proportion of well irrigation to ensure agriculture irrigation to the most extent during the extra draught year, and utilize the surface water for irrigation again in the following years while the Yellow...
In light of the research area current problems, SWAT model is chosen to simulate the infiltration quantity in the western of Jilin province, China. Based on data collection and field investigation, soil database has been built up in the study area. Matlab has been applied to re-calculate the diameter proportion of the soil components and SPAW used to obtain soil attributes. Result shows that in 2004a...
The conceptual hydrogeological model of the study area is generalized according to the hydrogeological conditions, and then the numerical model of groundwater flow is built by MODFLOW-2000. Under current condition of groundwater exploitation, the groundwater flow field in the year 2018 of the study area is forecasted. The result shows the groundwater level will decrease in the river valley of Jixi...
Xinfeng, is the typical region of the vegetation restoration of serious soil and water loss zone and a typical national demonstration zone for biological measures to control soil erosion in Jiangxi Province, SE China, in which the relationship between surface runoff and environmental factors, soil features and community features of restoration vegetation were analyzed using Detrended correspondence...
It applies hydrodynamic Model to simulate COD of sewage around Xiaoyangkou, Rudong City, Jiangsu Province in this paper. Curvilinear orthogonal grid is used in interesting area, and hydrodynamics and water quality model are used to the current velocity field and tidal level field both on case of the spring and the neap tide. The computational results are compared with measured field data around drain...
Contamination of the shallow aquifer by elevated nitrate concentrations is a common problem in many rural regions of the world. An aquifer that has both aquifer intrinsic vulnerability and irrigated land uses is especially susceptible to this type of contamination. A study was carried out to evaluate an aquifer's intrinsic vulnerability and agricultural activity's impact on groundwater quality in...
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