黄土丘陵沟壑区水土保持综合治理关键措施及其组合的研究

 通过对黄土丘陵沟壑区几条典型小流域和现有治理模式的分析评价,初步确定了该区不同侵蚀类型区水上保持综合治理的关键措施及其组合方案。各区的组合比例如下。第1副区和第2副区:水平梯田18％～25％,人工造林45％～55％,人工种草20％～25％,坝地5.5％～7.5％,水地0.5％～2.7％;第3副区:水平梯田42％～48％,人工造林32％～38％,人工种草18％～22％;第4副区和第5副区:水平梯田28％～35％,人工造林40％～46％,人工种草13％～17％,坝地小于5％,水地小于6％。

Key Measures and Their Combination for Soil and Water Conservation of Comprehensive Control in the Gully and Rolling Loess Region

By analyzing and assessing typical watersheds and the current modles of soil and water conservation in the gully and rolling loess region, the study preliminarily defines the key measures and combination of comprehensive control of soil erosion and water loss in types of erosion areas. The combination proportions in different types of erosion areas are seen as 18% to 25% for terrace, 45% to 55% for the planted forest, 20% to 25% for planted grass, 5.5% to 7.5% for the dam land and 0.5% to 2.7 % for the irrigated land in the 1 st and 2nd sub-region. and the combination proportions for terrace, planted forest and grasss are 42% to 48% , 32% to 38% and 18% to 22% respectively in the 3rd sub-region, In the 4th and 5th sub-regions these for terrace, planted forest, grass, dam land and irrigated land are 28% to 35% , 40% to 46% , 13% to 17% , less than 5% and 6% .respectively.