摘要
本文采取人工模拟和自然降雨两种形式进行了小流域的入渗产流试验,分别对坡耕地、林地、草地和裸地的降雨入渗产流的特征进行了系统研究,并利用Philip入渗理论和逐步线性回归基本方法对试验结果进行处理,建立了入渗产流及相关因子数学方程。结果表明:相对于裸地,林地和草地具有更明显的拦蓄径流和减少土壤侵蚀的作用,地表径流和拦蓄泥沙效率分别增加了36.20%、86.70%和44.50%、81.40%;降雨强度、土壤孔隙率、植被覆盖率、地下坡度及土壤初始含水量是影响小流域产流系数的关键性因素。本文揭示的辽西小流域的入渗产流变化特征,可为其他小流域的降雨径流蓄积利用和水环境生态治理提供决策依据和理论支撑。
In the paper,two forms of artificial simulation and natural rainfall are adopted for infiltration runoff generation test of small watersheds. The rainfall infiltration runoff generation characteristics in slope farmland,forest land,grassland and bare land are studied respectively and systematically. Philip infiltration theory and stepwise linear regression method are utilized to deal with test results. Infiltration runoff generation and correlation factor mathematical equations are established. The results show that forest land and grassland have more obvious effect in runoff impoundment and soil erosion reduction compared with the bare land,surface runoff and sediment impoundment efficiency are increased by 36. 20%,86. 70%,44. 50% and 81. 40% respectively. Rainfall intensity,soil porosity,vegetation coverage,subsurface slope and soil initial water content are the key factors affecting runoff generation coefficients in small watershed. In the paper,infiltration runoff generation change characteristics in small watershed of Western Liaoning are revealed,which can provide decision-making basis and theoretical support for the precipitation runoff accumulation utilization and water environment ecological management in other small watersheds.
出处
《中国水能及电气化》
2018年第2期32-36,共5页
China Water Power & Electrification
关键词
辽西小流域
降雨模拟
入渗产流
试验
small watershed in Western Liaoning
rainfall simulation
infiltration runoff generation
test
