LIU Yan,LIU Xue-quan,CUI Hong-xia,et al.A Preliminary Study on Law of Runoff and Sand Yield on Yellow Soil Slope Surface in Low Hilly of the Middle Reaches of the Yangtze River[J].Research of Soil and Water Conservation,2010,17(01):149-153.
长江中游低丘黄壤坡面地表产流产沙规律初探
- Title:
- A Preliminary Study on Law of Runoff and Sand Yield on Yellow Soil Slope Surface in Low Hilly of the Middle Reaches of the Yangtze River
- Keywords:
- simulated rainfall; yellow soil slope in low hilly; runoff and sand yield process; rainfall duration
- 分类号:
- S157.1
- 摘要:
- 通过野外人工模拟降雨试验,得出湖北省象鼻嘴小流域内2个板栗林梯地、2个花生农地(梯地、坡地各1个)径流小区在同等雨强条件下的产流产沙过程变化特征.结果显示：在水热状况、土壤、小地形等条件较一致的前提下,4个径流小区的初损雨量、历时表现为板栗梯地1>板栗梯地2>花生梯地>花生坡地;结合各径流小区产流产沙强度及累计过程线分析得出,梯地的水土保持效果明显优于坡地,坡地的产流产沙过程更为复杂;林地在拦蓄径流、增加入渗方面要明显优于农地;板栗梯地1,2的水沙流失特征差异显示出植被盖度、物种多样性等对地表产流产沙过程也有较大影响;各场雨的累计产流、产沙量与降雨历时之间符合Y=ax2+bx+c的多项式相关方程.
- Abstract:
- It obtains the change characteristics of runoff and sand yield process of 2 chestnut terrace and 2 peanut agricultural land(one terrace and one slope land) under the same rainfall intensity condition of Xiangbizui small watershed in Hubei Province,which from field of artificial simulated rainfall experiments.The results showed that:Under the premise of some conditions(water and heat status,soil,small terrain,and so on) are comparatively consistent,initial losses and initial yield duration of the 4 runoff plots manifest as chestnut terrace 1>chestnut terrace 2>peanut terrace>peanut slope land;Analytical results combine with runoff and sand yielding intensity process line and cumulative runoff and sand yield process line in different runoff plots showed that the terrace’s effect of soil and water conservation is markedly better than slope land’s,the runoff and sand yield process of slope land is more complex;About blocking runoff and increasing infiltration forestland are clearly better than the agricultural land;The differences of water and soil loss characteristics between chestnut terrace 1 and chestnut terrace 2 showed that vegetation cover,species diversity have a great impact on runoff and sand yield process on the land surface;The relevant polynomial equation of cumulative runoff,sand yield and rainfall duration of each simulated rainfall meet "Y = ax2+bx+c" form.
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备注/Memo
收稿日期:2009-8-18。
基金项目:国家“十一五”科技支撑项目(2006BAD-03A16-03)
作者简介:刘艳(1984- ),女,云南楚雄人,硕士研究生,主要研究方向为水土保持生态修复.E-mail:liuyan1984213@163.com
通讯作者:周金星(1972- ),男,湖南常德人,博士,副研究员,硕士生导师,主要从事小流域综合治理.E-mail:zjx9277@126.com