四川紫色土丘陵区不同耕作制的产流过程初步分析

Study on Process of Runoff in Different Three Tillage Systems in Hilly Area,Sichuan Province

通过径流小区的观测试验 ,对川中丘陵区旱坡地 3种典型的耕作制在 4次降雨过程中的产流过程作了分析。结果表明 :产流过程遵循二次函数 ;3种典型的耕作制的产流量大小分别为聚土免耕 <平板种植 <顺坡种植 ;聚土免耕减少径流达 2 0 %以上 ,最大达 4 0 % ,其产流过程明显滞后。因此 ,在旱坡地上推广聚土免耕耕作制对川中丘陵区的水土保持及拦蓄调洪是非常有效的措施。

The process of runoff in different three tillage system on four times Rainfall Condition were studied by means of the monitoring of runoff in experiment plot on slope-dry-land in the hilly area,Sichuan province. The results showed:The process of runoff were quadratic distribution in the different three tillage systems on four times Rainfall. Their runoff quantities are SNT＜CK＜CT.Runoff are decreased 20% or more in SNT, and its runoff process has hysteresis. It is a effective measurement of soil and water conservation,which adjust flood and sluice to spread the SNT on slope-dry-land in hilly of Sichuan province.