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林业科学 ›› 2002, Vol. 38 ›› Issue (5): 87-94.doi: 10.11707/j.1001-7488.20020515

• 论文及研究报告 • 上一篇    下一篇

黄土丘陵沟壑区水土保持人工林减蚀效应研究

焦菊英 王万忠 李靖 杨亚莉   

  1. 中国科学院水利部水土保持研究所,杨凌712100;西北农林科技大学,杨凌712100;陕西省铜川市果树研究中心,铜川727007
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2002-09-25 发布日期:2002-09-25

THE SOIL EROSION REDUCING BENEFIT OF SOIL AND WATER CONSERVATION OF PLANTATION ON THE LOESS HILLY AND GULLY REGION

Jiao Juying Wang Wanzhong Li Jing Yang Yali   

  1. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources Yangling712100;Northwestern Sci Tech University of Agriculture and Forestry Yangling712100;Tongchuan Fruit Tree Research Center of Shaanxi Province Tongchuan727007
  • Received:1900-01-01 Revised:1900-01-01 Online:2002-09-25 Published:2002-09-25

摘要:

根据黄土高原绥德、延安、离石、安塞等地的径流小区观测资料,以降雨指标大于坡耕地侵蚀性降雨标准为条件,即PI30>3.20mm2·min-1I30>0.28mm·min-1,分析了不同次降雨条件下人工林地相对于坡耕地的减水减沙效益,及整地工程对林地减蚀作用的影响,建立了不同降雨条件下不同盖度林地减水减沙效益的关系式(V=0~100;PI30=3.20~100mm2·min-1):R%=160.426 - 28.906 44(1/V) - 37.442log(PI30·V),r=0.835* *, n=88 S%=161.953- 31.03189(1/V) - 30.985log(PI30·V),r=0.682* *, n=88

关键词: 黄土高原, 人工林地, 水土保持, 减水减沙效益

Abstract:

Based on the runoff plots in Suide, Yan'an, Lishi and Ansai area on the Loess Plateau, the benefits of runoff and sediment reducing by woodland and the effective converage of woodland for soil and water conservation under different rainfall conditions were analyzed in the condition that rainfall index used in the analysis is bigger than that of erosive criterion of sloping field, i.e.PI30>3.20mm2·min-1 & I30>0.28mm·min-1 ; and the effects of preparing works to erosion reducing for soil water conservation of woodland were discussed. The soil and water conservation index of woodland with different coverage in different rainfall conditions were established (V=0~100;PI30=3.20~100mm2·min-1):R%=160.426 - 28.906 44(1/V) - 37.442log(PI30·V),r=0.835* *, n=88 S%=161.953- 31.03189(1/V) - 30.985log(PI30·V),r=0.682* *, n=88

Key words: Loess Plateau, Plantation, Soil and water conservation, Benefits of runoff and sediment reducing