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| 黑河上游地区基流分割及其变化特征分析 | |
| 引用本文： | 党素珍,王中根,刘昌明.黑河上游地区基流分割及其变化特征分析[J].资源科学,2011,33(12):2232-2237. |
| 作者姓名： | 党素珍 王中根 刘昌明 |
| 作者单位： | 1. 北京师范大学水科学研究院,北京,100875 2. 中国科学院地理科学与资源研究所,北京,100101 3. 北京师范大学水科学研究院,北京100875／中国科学院地理科学与资源研究所,北京100101 |
| 基金项目： | 国家重点基础研究发展计划(973)项目(编号：2009CB421305)；水利部公益性行业科研专项经费项目(编号：200701005)。 |
| 摘 要： | 基流是枯水期河川径流的主要来源，是一种比较稳定的径流组成部分，对于干旱内流河流域水文模拟和水资源开发利用至关重要。本文基于1979年-2008年莺落峡水文站的实测流量资料，采用数字滤波法中的单参数数字滤波法和递归数字滤波法对内陆河流域黑河上游的流量过程进行了基流分割研究。探讨了黑河上游年基流量和基流指数BFI的年内与年际变化特征，以及不同水平年基流指数BFI变化规律。研究表明，黑河上游基流量年内变化为先增后减，峰值出现在8月份，基流指数则是先减后增，6月份最小。受气温升高和融雪径流影响，黑河上游基流量年际变化呈增加趋势，而基流指数呈减少趋势。在不同水平年，枯水年份的平均基流指数BFI为O．577，平水年为0．551，丰水年为0．521。 |
| 关 键 词： | 基流分割 数字滤波法 基流指数 黑河上游 莺落峡 |
| 收稿时间： | 7/2/2011 12:00:00 AM |
Baseflow Separation and Its Characteristics in the Upper Reaches of the Heihe River Basin |
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| DANG Suzhen,WANG Zhonggen and LIU Changming.Baseflow Separation and Its Characteristics in the Upper Reaches of the Heihe River Basin[J].Resources Science,2011,33(12):2232-2237. | |
| Authors: | DANG Suzhen WANG Zhonggen and LIU Changming |
| Institution: | College of Water Science, Beijing Normal University, Beijing 100875, China;Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;College of Water Science, Beijing Normal University, Beijing 100875, China; Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China |
| Abstract: | Baseflow is the main source of streamflow in dry season of a year and it is a generally stable component of streamflow. The Heihe River basin is located in typical arid and semi-arid areas in Northwest China. The Qilian Mountain is its main runoff area. As the river is frozen partly during the end of winter and beginning of spring, baseflow is a major water source during this period. Studying baseflow is of importance for improving a greater understanding of water cycle, water stability, and maintenance of fragile desert ecosystems in the Heihe River basin. Based on observed runoff time series at the Yingluoxia station from 1979 through 2008, the one-parameter digital filter method and recursive digital filter method were jointly used for baseflow separation. Annual and interannual variations in baseflow, baseflow index (BFI), as well as variations in BFI for different water level years for the upper reaches of the Heihe River basin were investigated. Results show that annual distribution of baseflow increased first and then decreased, with the maximum value appearing in August, as opposed to the BFI distribution in a year with the minimum BFI value in June. Annual baseflow results from the one-parameter digital filter method and recursive digital filter method had a similar changing process, and the former method always had larger values. Variations in BFI from these two methods were different. Influenced by rising temperature and increasing snowmelt runoff, the long-term annual baseflow showed an increasing trend, while BFI calculated by the one-parameter digital filter method tended to decrease. The BFI range from the recursive digital filter method was generally stable and limited. The averaged baseflow and BFI from the one-parameter digital filter method was 28.4 m3/s and 0.539, which means that baseflow accounts for 53.9% of streamflow of the area of interest. As far as the recursive digital filter method is concerned, the averaged baseflow was 25.5 m3/s and the averaged BFI was 0.490. Averaged BFI from the one-parameter digital filter method in dry years, average years, and wet years were 0.577, 0.551, and 0.521, respectively. BFI was largest in dry years and smallest in wet years, which means that baseflow would be a more important source of runoff in dry years. This study provides important data for hydrological simulation as well as exploitation and utilization of water resources in the Heihe river basin. |
| Keywords: | Baseflow separation Digital filter BFI Upper reaches of the Heihe river Yingluoxia |
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