摘要
利用人工模拟降雨试验，通过在径流小区上覆盖纱网消除雨滴动能和增加雨滴降落高度来增加雨滴动能，并采用翻耕裸露作对照的试验处理，对黄土区坡耕地细沟间侵蚀和细沟侵蚀过程及其机理进行了研究。结果表明，坡面侵蚀产沙过程可明显的分为四个阶段，即溅蚀、细沟间侵蚀、细沟侵蚀和雨后径流侵蚀阶段。用纱网覆盖消除99．6％的雨滴动能后，细沟间侵蚀和细沟侵蚀分别减少35—61％和38—64％。文中对雨滴动能影响细沟间侵蚀和细沟侵蚀的机理进行了分析研究。
Using simulated rainfall experiment, interill erosion and rill erosion on slope farmland of loess area were researched through putting nylon net cover on runoff plots.to eliminate raindrop kinetic energy, increasing raindrop falling height to increase raindrop kinetic energy and turning up the soil as the contrast tests. The results showed that erosion and sediment can be divided intO 4 stages, that is, raindrop splash,intetrill erosion, rill erosion and runoff erosion after raining. After eliminating 99.6%of raindrop kinetic energy, intenill erosion and rill erosion were obviously reduced,interrill erosion was decreased by 35-61% and rill erosion was reduced by 35—64%.In addition, affecting mechanism of raindrop kinetic energy on interrill erosion and rill erosion was analyzed.
出处
《土壤学报》
CAS
CSCD
北大核心
1998年第1期95-101,共7页
Acta Pedologica Sinica
基金
中国科学院‘百人计划’项目
"黄土高原土壤侵蚀与旱地农业国家重点实验室"基金
国家基金!49671051
关键词
坡耕地
土壤侵蚀
细沟侵蚀
雨滴功能
Slope farmland, Interrill erosion, Rill erosion, Raindrop kinetic energy
