详细信息
华北落叶松枯落物覆盖对地表径流的拦阻效应 被引量:25
The Effect of Ground Covering by Litter of Larix principis-rupprechtii to Reducing Velocity of Surface Runoff
文献类型:期刊文献
中文题名:华北落叶松枯落物覆盖对地表径流的拦阻效应
英文题名:The Effect of Ground Covering by Litter of Larix principis-rupprechtii to Reducing Velocity of Surface Runoff
作者:何常清[1] 于澎涛[2] 管伟[2] 王彦辉[2] 袁玉欣[1] 郭明春[2] 杜阿朋[1] 董晓红[2]
第一作者:何常清
机构:[1]河北农业大学林学院;[2]中国林业科学研究院森林生态环境与保护研究所
年份:2006
卷号:19
期号:5
起止页码:595-599
中文期刊名:林业科学研究
外文期刊名:Forest Research
收录:CSTPCD;;Scopus;北大核心:【北大核心2004】;CSCD:【CSCD2011_2012】;
基金:国家重大基础研究项目(2002CB111501);国家自然科学基金重点项目(30230290);国家林业局引进国际先进技术项目(2003-4-43);科技部社会公益研究专项(2004DIB3J102);国家林业局森林生态环境重点试验室联合资助
语种:中文
中文关键词:华北落叶松;枯落物覆盖;地表径流;流速;曼宁阻力系数
外文关键词:Larix principis-rupprechtii; litter coverage; surface runoff; velocity of flow ; Manning resistant coefficient
分类号:S715
摘要:在宁夏固原六盘山叠叠沟小流域坡面径流小区(长0.9m、宽0.5m)内进行了10种枯落物覆盖量(0.0、0.5、1.0、3.0、5.0、7.0、10.0、15.0、20.0、25.0t·hm^2)、5个人口流量(10、20、30、40、60mL·s^-1)的地表径流试验。结果表明:当枯落物覆盖量从0.0t·hm^-2增加到25.0t·hm^-2时,地表径流流速与无枯落物覆盖相比减小了57.50%~72.27%;地表径流流速随入口流量增加而明显加大,尤其是无枯落物覆盖时增加最快;在坡度为14°的条件下,枯落物覆盖对地表径流流速的阻延值△V(cm·s^-1)与单宽流量q(mL·s^-1·cm^-1)、枯落物覆盖量G(t·hm^-2)的关系为:△V=3.6177q^0.5075G^0.4315(R^2=0.9102);枯落物覆盖量增加使地表曼宁阻力系数n值加大,在枯落物覆盖量小于10.0t·hm^-2时,n值随枯落物量增加而急剧加大;当枯落物覆盖量在10.0~25.0t·hm^-2范围内增加时,n值的加大趋势逐渐变缓;n值与枯落物覆盖量之间呈较好的二项式关系。
For studying the effect of ground covering by Larix principis-rupprechtii litter on reducing the velocity of surface runoff, the experiment was conducted with 0.9 m ×0.5 m plots on slopes in Diediegou small watershed of Liupan Mountain in Guyuan, Ningxia. The treatments of 10 litter coverage (0. 0, 0.5, 1.0, 3.0, 5.0, 7.0, 10. 0, 15.0, 20.0 and 25.0 t·hm^-2 ) and 5 input flux( 10, 20, 30, 40 and 60 mL· s^-1 ) were used. The results showed that compared with the treatment with no litter coverage, the surface runoff velocity was reduced by 57.50% -72.27% when the litter coverage varies from 0. 0 to 25.0 t·hm^-2. The surface runoff velocity had an evident increase with increasing input flux, especially the fastest increase in the ease of without litter coverage. On the slope of 14°, the relation among the reduced runoff velocity (△V,cm ·s^-1 ) , the flow of unit width (q, mL· s^-1·cm^-1), and litter coverage (G, t· hm^-2) was:△V=3.617 7q^0.507G^0.4315 (R^2 =0. 910 2). The Manning resistant coefficient (n) increased with litter coverage. When the litter coverage was less than 10.0 t·hm^-2, the valueof n evidently increased with the litter coverage; while the litter coverage caries in the range of 10.0 to 25.0 t·hm^-2, the value of n increased more and more slower. And there was a satisfied binomial relationship between n and litter coverage.
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