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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 rainfall simulation experiments were conducted on the leaching layer, sedimentary layer and parent material layer of the granite covering the jute geotextile. Runoff and sediment were collected under the conditions of rainfall intensity 70mm / h and slope 20 °. Effect of geotextiles on sediment retention of different particle sizes in granite. The results show that the coverage of jute geotextile can effectively reduce and stabilize the loss tendency of each particle size. When the water content is (20 ± 2)%, the leaching layer, deposition layer and parent layer increase by 8.73% , 18.40% and 13.06% respectively. The amount of sediment decreased by 73.65%, 72.70% and 66.91% respectively. The intercepting ratio of jute geotextile to the particle with the diameter of 0.2mm was the largest, while for the particle with the diameter of <0.2mm The largest amount of particles blocked.