黄麻土工布对不同层次土体的水土保持效用分析  

Effect Analysis of Soil and Water Conversation of Jute Geotextile on the Different Layers of Soil

作　　者：张勇[1] 丁树文[1,2] 万绍文[1] 张晓明[1] 邓羽松 王秋霞[1] 

机构地区：[1]华中农业大学水土保持研究中心,武汉430070 [2]农业部长江中下游耕地保育重点实验室,武汉430070

出　　处：《水土保持学报》2014年第4期23-28,共6页Journal of Soil and Water Conservation

基　　金：国家科技攻关项目(2011BAD31BO4);国家自然科学基金(41201271)

摘　　要：通过对覆盖黄麻土工布的花岗岩发育的淋溶层、淀积层、母质层进行室内降雨模拟实验,控制雨强在70mm/h和坡度在20°的条件下,收集径流和泥沙,研究黄麻土工布对花岗岩发育的不同土层不同粒径泥沙的保持效用。结果表明,覆盖黄麻土工布能够有效地降低和稳定各土体各粒径的流失趋势;在含水率为(20±2)%时,对淋溶层、淀积层、母质层分别增加8.73%,18.40%,13.06%的入渗量;分别减少73.65%,72.70%,66.91%的泥沙量;覆盖黄麻土工布对>0.2mm粒径的颗粒拦截比最大,而对于<0.2mm粒径的颗粒拦蓄量最多。Indoor simulating rainfall experiments were conducted on weathered granite soil of eluvial horizon, illuvial horizon, parent material horizon. Under the condition of rainfall intensity was 70 mm/h and the slope was 20°, runoff and sediment were collected in order to analyze the effect of soil and water conservation. The results showed that covering jute geotextile could effectively reduce and stabilize the trend of sediment increase of different layers and different particle sizes. It increased the infiltration of eluvial horizon, illuvial horizon, parent material horizon by 8.73%, 18.40%, 13.06% respectively even the soil moisture content was as high as （20±2）%, and also reduced by 73.65%, 72.70%, 66.91% sediment respectively. Since jute geotextile covered, large particles （〉0.2 mm） got the highest interception rate among all particles, while for small particles （0.2 mm） got maximum amount of intercepted.

关 键 词：黄麻土工布 花岗岩风化土 径流 泥沙 拦截比 

分 类 号：S157.1[农业科学—土壤学]