黄土高原水土保持措施对下垫面抗蚀力影响分析

深入研究水土保持措施对下垫面抗蚀力的影响能够丰富水土保持措施对水土流失治理影响的理论、方法,也能为小流域治理和利用提供科学的依据.在GIS、遥感技术支持下,采用层次分析法和Delphi咨询的方法,建立了水土保持措施对下垫面抗蚀力影响的定量评价指标体系.并以岔巴沟流域为例,定量分析了该流域1990年和2004年的水土保持措施对抗蚀力影响程度,得出各项措施对下垫面抗侵蚀能力的增强程度分值,由强到弱依次是:造林种草55、淤地坝45、梯田29.

Influences of Soil and Water Conservation Measures on Anti-erodibility of Underlying Surface in Loess Plateau

The thorough study of the effect of soil and water conservation measures on the underlying surface’s anti-erodibility can enrich the theory and method of rehabilitating soil and water loss,and also provide scientific basis for the rehabilitation and exploitation of small watershed.The text supported by GIS and RS technique,and adopting analytic hierarchic process and Delphi consultative method builds quantitative evaluation index system of the effect on the anti-erodibility of underlying surface under the protection of soil and water conservation measures.The text takes the Chabagou basin for example,analyzes quantitatively the effect of soil and water conservation measures on the anti-erodibility in 1990 and in 2004,and obtains the score of each measure.The score from the high to low is:forestation and grass planting(55),check dam(45),terrace(29).