水土保持学报2011，Vol.25Issue(2)：39-43,5.
不同管理方式竹林地产流产沙过程模拟试验
Simulation Rainfall Experiment of Soil and Water Loss Processes on Bamboo Forest Slopes Land under Different Managements
摘要
Abstract
The management methods of bamboo forest were divided into three types. They were non-till bamboo timber forest(BTF),bamboo shoots forest with once clearing weeds and bamboo subterranean stem per year(BSF-1) and per two years(BSF-2). The process experiments of runoff and sediment yield were conducted on bamboo forest slope fields under different managements in Linan and Anji counties of Zhejiang province. The testing runoff plots were designed with the slope of 20°, the area of 3 m × 1.5 m, respectively on the different managemental bamboo forest slope lands. The experimental method of using rainfall simulator was taken,simulated rainfall intensity of 31.8～114 mm/h for 0.5～1 h from runoff occurring. The process characteristics of runoff and sediment yield were analyzed on the basis of simulated rainfall of 8 sets. Some conclusions were obtained as following. ① In the experimental process per set,the difference between minimum and maxmum of sediment amount was very little on the BTF plot, and it was very great on the BSF-1 and BSF-2 plots. The maxmum of sediment amount occurred at beginning of runoff yield,and it decreased as rainfall experiment lasted. ② Under the same rainfall intensity,the runoff volume was very littler on the BSF-1 and BSF-2 plots than on the BTF plot, but the sediment amount was very greater with thousand times increasing on the BSF-1 and BSF-2 plots than on the BTF plot. ③ As the rainfall intensity increased,the erosion modulus increased rapidly on the BSF-1 and BSF-2 plots with hundredfold, relatively, the erosion modulus increased slowly on the BTF plot. ④ Sediment amount increased with a index rule, as repeated times of clearing weeds and bamboo subterranean stem increased and rainfall intensity increased. ⑤ According to 8 sets rainfall experiments,the critical erosive rainfall intensity was determined as ≥60.6 mm/h. Above resuits can provde some scientific basis for bamboo forest management.关键词
用材竹林/笋竹林/人工模拟降雨/产流产沙/侵蚀模数Key words
bamboo timber forest/ bamboo shoot forest/ simulation rainfall/ runoff and sediment yield/ erosion modulus分类
农业科技引用本文复制引用
张丽萍,吴希媛,张锐波..不同管理方式竹林地产流产沙过程模拟试验[J].水土保持学报,2011,25(2):39-43,5.基金项目
项目资助:浙江省低丘缓坡水土流失防治对策研究项目(RI0701) （RI0701）
