Study On Ecological Water Use In Xiangride River Basin

Based on the basic theory of ecology,this paper constructs the classification of ecosystems,divides it into the ecological water and the future ecological water demand,and combines with the actual situation of Xiangride River Basin.The ecological water in the basin is divided into forest vegetation ecological water,grassland ecological water,farmland ecological water,lake ecological water,river sediment transport water and river base water.According to the collected water resources,vegetation,meteorological and other background information,reasonable sorting and selection,the use of quota calculation of the Xiangsheng and the basin of various types of ecological water consumption,the results are: forest vegetation ecological water consumption 3.66 × 10~8m~3;grassland ecological water consumption 6.38 × 10~8m~3;farmland ecological water consumption 0.58 × 10~8m~3;lake ecological water consumption 5.18 × 10~8m~3;river basal ecological water consumption 1.29 × 10~8m~3;river sediment ecological water consumption 2.35 × 10~8m~3.Based on the analysis of ecological water use characteristics,the ratio of ecological water consumption to total precipitation in Xiangshe River Basin is obtained,that is,the quantity of ecological water use and the ecological quantity per unit area per unit time.The ecological water use coefficient is 47.86% and 12.79 × 104m3 / km2 in the basin.Through the precipitation balance analysis,the relationship between ecological water and water resources in the basin is obtained.According to the ecological construction plan of Xiangshe River Basin,the ecological water demand of the basin was 20.66 × 10~8m~3,the ecological water requirement of forest vegetation was 3.68 × 10~8m~3,the ecological water consumption of grassland was 7.31 × 10~8m~3,the ecological water consumption of farmland was 0.87 × 10~8m~3,The ecological water use in the river does not change much.