黄土高原现状梯田和林草植被的减沙作用分析  

Analysis on sediment yield reduced by current terrace and shrubs-herbs-arbor vegetation in the Loess Plateau

作　　者：刘晓燕[1] 杨胜天[2] 王富贵[3] 何兴照[3] 马红斌[3] 罗娅[2] 

机构地区：[1]黄河水利委员会,河南郑州450003 [2]北京师范大学,北京100875 [3]黄河上中游管理局,陕西西安710021

出　　处：《水利学报》2014年第11期1293-1300,共8页Journal of Hydraulic Engineering

基　　金：国家科技支撑计划课题(2012BAB02B05)

摘　　要：2000年以来,黄河来沙明显减少。本文以黄土高原主要产沙区为对象,利用卫星遥感与实地调查相结合方法,获取2012年研究区各支流的梯田面积和质量信息,分析2010—2013年林草植被覆盖率及其较天然时期的变化;提出林草与梯田叠加作用地区的减沙量计算方法。基于流域尺度上构建的黄土丘陵沟壑区林草植被覆盖率与产沙系数、梯田比与减沙幅度之间的响应关系,计算在多年平均降雨条件下黄河龙门、北洛河状头、汾河河津、渭河咸阳和泾河张家山等5站以上现状林草植被和梯田的减沙能力,其值为10.65亿t,占该区天然年均来沙量的60%。s：The sediment yield of the Yellow River have been reduced sharply since 2000. Based on the re？mote sensing information and local investigation in the sandy region of the Loess Plateau, this investigation analyzes the quantity and quality of the current terrace, the status of shrubs-herbs-arbor vegetation in 2010-2013 and the restoration effect comparing with its natural period. Their sediment reduction calculation methods and procedures for the coexistence situation of the terrace and shrubs-herbs-arbor vegetation resto？ration were demonstrated in this paper. Under the average rainfall condition of years, the calculation result revealed that the sediment reduction capacity of the current terrace and shrubs-herbs-arbor vegetation at their 2010-2013 level is about 1.065 billion ton in the area of above Longmen, Zhuangtou of the Beiluo River, Hejin of the Fenhe River, Xianyang of the Weihe River and Zhangjiashan of the Jinghe River, which account for 60% of its original sediment yield.

关 键 词：黄土高原 林草植被 梯田 减沙量 

分 类 号：S157.3[农业科学—土壤学]