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| 最近30年河龙区间降雨侵蚀力的时空演变特征 | |
| 引用本文： | 刘建祥,李智广,张晓萍,李锐,许晓鸿,周鸿文.最近30年河龙区间降雨侵蚀力的时空演变特征[J].中国水土保持科学,2013,11(2):6-13. |
| 作者姓名： | 刘建祥 李智广 张晓萍 李锐 许晓鸿 周鸿文 |
| 作者单位： | 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,712100,陕西杨凌;中国科学院研究生院,100049,北京 2. 水利部水土保持监测中心,100053,北京 3. 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,712100,陕西杨凌 4. 吉林省水土保持科学研究院,130033,长春 5. 黄河水利委员会水文局,450004,郑州 |
| 基金项目： | 第一次全国水利普查"国务院第一次全国水利普查" |
| 摘 要： | 为准确定量评估代表降雨引起土壤侵蚀潜在能力的指标——降雨侵蚀力，收集黄河中游河龙区间各县共96个气象站点1981—2010年的日降雨资料，基于半月降雨侵蚀力模型对区间半月、月、季节、年尺度上降雨侵蚀力的时空变化特征进行评价。结果表明：1）7月下半月、8月和夏季的降雨侵蚀力分别在相应的时间尺度上最大，年均降雨侵蚀力在空间上从西北到东南呈增加趋势；2）河龙区间年降雨侵蚀力总体呈下降趋势，减少的面积占区间总面积的68．45％，7月上半月降雨侵蚀力的减少对区间年降雨侵蚀力的减少贡献最大；3）年降雨侵蚀力增加的地区主要集中于河龙区间西北部和东南部，7月上半月降雨侵蚀力呈增加趋势的面积仅占总面积的1．12％。 |
| 关 键 词： | 时空演变 降雨侵蚀力 河龙区间 |
Spatio-temporal variation characteristics of the rainfall erosivity in He-Long region during last 30 years |
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| Liu Jianxiang , Li Zhiguang , Zhang Xiaoping , Li Rui , Xu Xiaohong , Zhou Hongwen.Spatio-temporal variation characteristics of the rainfall erosivity in He-Long region during last 30 years[J].Science of Soil and Water Conservation,2013,11(2):6-13. | |
| Authors: | Liu Jianxiang Li Zhiguang Zhang Xiaoping Li Rui Xu Xiaohong Zhou Hongwen |
| Institution: | 1. Tile State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservationg Chinese Academy of Seienees and Ministry of Water Resources, 712100, Yangling, Shaanxi; 2. Graduate University of the Chinese Academy of Seienees, 100049, Beijing; 3. Soil and Water Conservation Monitoring Centre, Ministry of Water Resources 100053, Beijing; 4. Soil and Water Conservation Institute of Jilin Province, 130033, Changehun; 5. Hydrology Bureau of Yellow River Water Conservancy Commission, 450004, Zhengzhou： China) |
| Abstract: | To evaluate the rainfall erosivity quantificationally as accurate as possible, subsequently to estimate the potential capacity of rainfall-induced soil erosion, daily precipitation data was collected from 96 meteorological stations of every county in He-Long section of the middle reaches of Yellow River during 1981 -2010. Based on the rainfall erosivity model of half month, the spatio-temporal variations of rainfall erosivity at half month, month, season and year scale were analyzed. Results indicated that： 1 ） Rainfall erosivity at the second half of July, August, and summer were greatest at the corresponding time scales. Average annual rainfall erosivity increased from northwest to southeast at space. 2） Annual rainfall erosivity showed decreasing trend overall, and the area of rainfall erosivity reduced occupies 68.45% of the whole area. In addition, the rainfall erosivity reduced in the first half of July made the largest contribution to the decrease of the annual rainfall erosivity. 3） The increasing area of annual rainfall erosivity mainly located at the northwest and southeast of the He-Long region, moreover, rainfall erosivity in the first half of July showing increasing trend only covered l. 12% of the total area. |
| Keywords: | spatio-temporal variation rainfall erosivity He-Long region |
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