重庆市黔江县小流域综合治理效益评估

ESTIMATE OF BENEFIT ON THE INTEGRATED CONTROL FOR SMALL AWTERSHED IN QIAN JIANG COUNTY,CHONG QIING CITY

通过对治理和非治理的两个条件相似的小流域的对比分析进行综合治理效益评估，结果表明：治理小流域减洪减沙效益及农作物增产增收效益显著。这将为西南山区类似条件的小流域综合治理提供一定的示范作用。

The study chooses two small watershed,controlled watershed and uncontrolled watershed,to estimate comparativelly the benefit of the integrated control for the controlled small watersheds.The results show that benefit of reduction in runoff and sediment,the benefit of increase in output and income of farming in the contolled watershed are very obvious as compared with the uncontrolled watershed. This will take demonstrational role in the integrated control of small watershed in mountain region of southwestern China.The study draws conclusions that(i) slope farmland is the severest place of soil erosion and main source of river and channel′s sediment,(ii)the intensity of rainfall is a key factor that has effect on the intensity of soil erosion.Finally, the control countermeasures are raised as to the slope farmland.