Estimating the Impact of Conservation Measures on Stream-flow Regime in Catchments of the Loess Plateau, China
Received date: 2007-12-15
Revised date: 2008-03-04
Online published: 2008-04-10
Catchments in the Loess Plateau have been under the influence of human activities for centuries, especially in the last several decades when soil conservation measures were accelerated and intensified. These measures were designed to reduce soil erosion, improve agricultural productivity, and enhance environmental quality. It is important to evaluate the effects of these measures on hydrology in order to develop sustainable catchments management plans in the region. This study evaluated changes in stream-flow regime for four selected catchments in the Loess Plateau following large scale soil conservation measures. Parametric and non-parametric Mann-Kendall tests were used to identify trends in annual stream-flow and results showed significant downward trends in three out of the four catchments. The Pettitt's test indicated that a change point occurred in 1978 in these three catchments. Comparison of daily flow duration curves for two 20-years periods starting and ending in the mid 1970's (i.e., mid 1950s to mid 1970s and mid 1970s to mid 1990s) showed significant changes in stream-flow regime. Reduction in most percentile flows varied between 20% to 45 %, while reduction in low flows was much greater. Overall the reductions in daily flow are increasing as a function of time, with significant changes occurred in the 1990's. However, it is not clear if these catchments have seen the full effects of the soil conservation measures.
MU Xingmin , Basang Chille , ZHANG Xiaoping , GAO Peng . Estimating the Impact of Conservation Measures on Stream-flow Regime in Catchments of the Loess Plateau, China[J]. Advances in Earth Science, 2008 , 23(4) : 382 -389 . DOI: 10.11867/j.issn.1001-8166.2008.04.0382
[1] Xu Jianhua，Niu Yuguo. Impact of Water and Soil Conservancy Project on Runoff and Sediment in in Coarse and Sandy Region of Middle Reaches of the Yellow River [M]. Zhengzhou：Yellow River Water Conservancy Publishing House，2000:158-174.[徐建华，牛玉国. 水利水保工程对黄河中游多沙粗沙区径流泥沙影响的研究[M]. 郑州: 黄河水利出版社，2000：158-174.]
[2] Ran Dachuan，Liu Linwang，Zhao Liyi，et al. Water and Soil Conservation and Runoff and Sediment Change in Hekou-Longmen Region in Middle Reaches of Yellow River [M]. Zhengzhou：Yellow River Water Conservancy Publishing House，2000:124-137.[冉大川，柳林旺，赵力仪，等.黄河中游河口镇至龙门区间水土保持与水沙变化[M]. 郑州: 黄河水利出版社，2000：124-137.]
[3] Mu Xingmin，Xu Xuexuan，Chen Qiwei. Research of Eco-hydrology on the Loess Plateau [M]. Beijing: China Forestry Publishing House，2001.[穆兴民，徐学选，陈霁巍，著.黄土高原生态水文研究[M].北京：中国林业出版社，2001.]
[4] Mu Xingmin. Impact of soil and water conservation on river flow and soil-hydrology on the Loess Plateau [D]. Yangling: Northwest Sci-Tech University of Agriculture and Forestry，2002.[穆兴民.黄土高原水土保持对河川径流及土壤水文的影响[D].杨凌：西北农林科技大学，2002.]
[5] Huang M，Lu Zhang. Hydrological responses to conservation practices in a catchment of the Loess Plateau，China [J]. Hydrological. Process，2004，18:1 885-1 898.
[6] Foster H A. Duration curves [J]. American Society of Civil Engineers Transactions，1934，99:1 213-1 267.
[7] Vogel R M，Fennessey N M. Flow Duration Curves I: A New Interpretation and Confidence Intervals [J]. Journal of Water Resources Planning and Management，1994，120（4）:210-215.
[8] Smakhtin V U. A Concept of Pragmatic Hydrological Time Series Modeling and Its Application in South African Context [M]. Ninth South African National Hydrology Symposium，1999:1-11.
[9] Best A E，Zhang L. Development of a model for predicting the changes in flow duration curves due to altered land use conditions [J]. Hydrological Process，2004，18:1 885-1 898.
[10] Mu Xingmin，Bashang Chile，Gao Peng，et al. Impact of soil conservation measures on runoff and sediment in Hekou-Longmen region of the Yellow River [J]. Journal of Sediment Research，2007，（2）: 36-41.[穆兴民，巴桑赤烈，高鹏，等.黄河河口镇至龙门区间来水来沙变化及其对水利水保措施的响应[J].泥沙研究，2007，（2）:36-41.
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