学术
黄土丘陵区不同土地利用方式产沙规律研究
连振龙[1] 刘普灵[1] 徐学选[1] 贺萍[2]
[1]中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100 [2]安塞县农业经济管理站,陕西安塞717400
摘 要:
通过对黄土丘陵区退耕还林（草）坡地的人工模拟降雨实验资料的分析，认为区分导致该区草灌坡地不同产流方式的临界降雨强度为1．40～1．45mm／min。裸露坡耕地产沙强度产生明显变化的临界降雨强度为1．50～1．53mm／min。同时讨论了该区不同土地利用方式的产沙规律，给出了其相关方程。研究结果表明植被通过改变坡面产水产沙规律。对减少坡面侵蚀产沙作用显著。[著者文摘]
文章出处:
《自然杂志》-2008年30卷1期,31 -28-30,31页
栏目信息:
Study on Sediment-Yield Characteristics of Differ： ent Land Use in Loess Hilly Region
LIAN Zhen-long , LIU Pu-ling , XU Xue-xuan , HE Pinge（1Graduate Student,2,3 Professor, Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, State Key Laboratory of Soil Erosion and Dryland Farming On the Losse Plateau, Yangling 712100, Shaanxi, China ;4Assistont Engineer, Ansai Agro-economy Administration, Ansai 717400, Shaanxi , China）
Abstract:
By analysis of the data of field simulated rainfalls, it can be concluded that in the Loess Hilly Region, the critical rainfall intensity that can distiguish the two main runoff-production modes on grass and bushes ranges from 1.40 mm/min to 1.45 mm/min. And on bare sloping field, the critical rainfall intensity that make sharp transfomation of sediment-yield intensity ranges from 1.50 mm/ min to 1.53 mm/min. At the same time, the sedimentyield charicterdistics of different land use was presented, and finds their correlative equation. Results indicate the great benefits of vegetation on decreasing slope soil erosion.[著者文摘]
Key words:
Loess Hilly Region; land use; simulated rainfall; sediment yield
基金资助:
致谢 本研究承国家重点基础研究发展计划（编号：2007CB407205）、中科院知识创新工程西部项目（编号：KZCX2-XB2-05）和国家科技支撑计划（编号：2006BAD09B05）基金支持,实验过程经徐学选、郑世清、史新合老师悉心指导,郑世锋等人帮助,在此一并致谢!
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