期刊论文

中文

水土保持学报

1009-2242

2014

28

1

58-62

10.3969/j.issn.1009-2242.2014.01.011

国家自然科学基金项目（40801107） 湖南省财政厅资助项目（湘财建指[2009]293号）（2130316）

本校为第一机构

采用针头式降雨器对零坡度、短坡长、不透水底层的红壤土体进行人工模拟降雨试验,在消除坡度坡长影响模拟南方蓄满产流条件下,研究前期土壤含水量对红壤产流、产沙及溶质运移机制的影响.结果表明:前期土壤含水量为20％时,红壤黏结力最大且结构最稳定,初始产流时间延续最长,入渗水量最多,径流总量最少,泥沙流失量少,形成蓄满产流条件;前期含水量为饱和时,则反之.径流中溴离子流失量和流失率随着前期土壤含水量的变化而变化,其数量大小顺序为20 ％＞10 ％＞2％;磷的流失总量,无论是溶解态磷(DP)还是颗粒态磷,流失总量大小依次为饱和＞20％＞10％＞2％.

In order to eliminate the effects of gradient and length of slope and simulate the runoff generation under saturated condition in southern red soil region, effects of antecedent soil moisture （ASM） on the transport of sediment and soluble chemicals to runoff and infiltration into a red soil were investigated under these conditions with zero gradient, short slope length and impervious layer and using a needle rainfall simulator. Results showed that, compared with different ASMs, the smallest runoff volume and soil loss were obtained because of...