辽西低山丘陵地区水平槽防治水土流失的研究

Soil and water loss control in hilly regions of western Liaoning province through constructing horizontal troughs.

采用野外调查、定位实验和室内分析相结合的方法 ,通过水平槽与鱼磷坑、荒坡防治水土流失的比较 ,研究了水平槽工程及其生物措施防治低山丘陵地带的水土流失所起的作用 .结果表明 ,水平槽工程利用截水埂拦截径流 ,通过增大土壤入渗速率和延长入渗时间 ,蓄积更多的水分 ;结合植树种草减少蒸发 .水平槽在截获径流的同时 ,也使径流携带的有机无机物质沉积在槽内 ,参与土壤的进一步发育 ,改善当地的农业生态环境 .

Field investigation, fixed location experiment and laboratory analysis show that in comparison with fish scaled pit, horizontal trough could intercept more runoff, increase its infiltration into soil and prolong its infiltration duration. Constructing horizontal trough combined with planting trees and grasses could decrease water evaporation from soil.In the horizontal trough, organic and inorganic matters carried by runoff could be deposited, which participated in the further development of soil and improved the local agro ecological environment.