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J4  2013, Vol. 47 Issue (7): 1199-1204    DOI: 10.3785/j.issn.1008-973X.2013.07.010
土木工程     
人类活动对海岛土壤侵蚀影响的数值模拟
冉启华,李蔚,梁宁,许月萍
浙江大学 水文与水资源工程研究所,浙江 杭州 310058  
Physics-based numerical simulation of human impacts on island soil erosion
RAN Qi-hua, LI Wei, LIANG Ning, XU Yue-ping
Institute of Hydrology and Water Resources, Zhejiang University, Hangzhou 310058, China  
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摘要:

利用基于物理概念的综合水文模型(InHM),模拟分析舟山市摘箬山岛开发前、后侵蚀的变化情况,研究不同土地利用工况对土壤侵蚀的影响规律.模拟结果表明,开发前沟间侵蚀较严重,尤其是道路的侵蚀与堆积相对明显;开发后由于下垫面的改变,各边界出口流量增大,混凝土铺面的道路和东岙基本不产生大的侵蚀,北岙因道路北段产流增大并顺势而下,产生较大冲刷,西岙出口输沙量的增加幅度大.在暴雨情况下,各岙产流产沙响应更加显著.由于海岛的植被覆盖率高,且开发建设基本在地势低平地区,因此开发区及林地的侵蚀变化不大,但西岙和北岙间接受到影响,侵蚀变化较大.

Abstract:

A physics-based hydrologic-response and soil erosion numerical model – integrated hydrology model (InHM) was employed to simulate the variation of island soil erosion, taking Zhairuo island, Zhoushan, Zhejiang, as an example, under different land-use scenarios. The impacts of human activity on soil erosion were analyzed. Simulation results show that erosion is relatively serious, especially on the road, before the construction, and discharge of boundary outlet increases after construction due to the changes of surface condition. Little erosion was simulated at the road and the east-zone post-construction period because of the pavement. However, the increased runoff generated on the road will intensify erosion in the north-zone and the west-zone.  The responses of runoff and sediment are more significant under extreme storm condition. Because the vegetation covering rate is high and the construction is mostly concentrated on the low and flat terrain, the change of erosion will be generally minor although there will be important change on the west and north zones.

出版日期: 2013-07-01
:  TV 121.7  
基金资助:

 浙江省自然科学基金资助项目(R5110012).

通讯作者: 许月萍,女,副教授.     E-mail: yuepingxu@zju.edu.cn
作者简介: 冉启华(1973-),男,副教授,从事水文与水资源、地表侵蚀等的研究. E-mail: ranqihua@zju.edu.cn
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引用本文:

冉启华,李蔚,梁宁,许月萍. 人类活动对海岛土壤侵蚀影响的数值模拟[J]. J4, 2013, 47(7): 1199-1204.

RAN Qi-hua, LI Wei, LIANG Ning, XU Yue-ping. Physics-based numerical simulation of human impacts on island soil erosion. J4, 2013, 47(7): 1199-1204.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2013.07.010        http://www.zjujournals.com/eng/CN/Y2013/V47/I7/1199

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