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冰川冻土 ›› 2014, Vol. 36 ›› Issue (1): 192-199.doi: 10.7522/j.issn.1000-0240.2014.0024

• 寒旱区水文水资源 • 上一篇    下一篇

汾河上游土地利用变化及其水文响应研究

陆志翔1,2, 杨永刚3, 邹松兵1, 肖洪浪1, 尹振良1, 谢家丽4   

  1. 1. 中国科学院 寒区旱区环境与工程研究所 内陆河流域生态水文重点实验室/甘肃省黑河生态水文与流域科学重点实验室, 甘肃 兰州 730000;
    2. 中国科学院大学, 北京 100049;
    3. 山西大学 黄土高原研究所, 山西 太原 030006;
    4. 中国科学院 寒区旱区环境与工程研究所 沙漠与沙漠化重点实验室, 甘肃 兰州 730000
  • 收稿日期:2013-08-02 修回日期:2013-12-29 出版日期:2014-02-25 发布日期:2014-03-18
  • 通讯作者: 邹松兵,E-mail:zousongbing@lzb.ac.cn E-mail:zousongbing@lzb.ac.cn
  • 作者简介:陆志翔(1986-),男,湖南新化人,2012年在中国科学院寒区旱区环境与工程研究所获硕士学位,现为在读博士研究生,主要从事水文水资源和生态水文研究. E-mail:lzhxiang168@163.com
  • 基金资助:

    国家国际科技合作专项(2012DFA20770;2013DFG70990);国家自然科学基金项目(41201043);山西省基础研究计划青年科技研究基金项目(2012021026-3)资助

A study of the land use change and its hydrologic response in the upper reaches of the Fen River

LU Zhixiang1,2, YANG Yonggang3, ZOU Songbing1, XIAO Honglang1, YIN Zhenliang1, XIE Jiali4   

  1. 1. Key Laboratory of Ecohydrology of Inland River Basin, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences / Heihe Key Laboratory of Ecohydrology of Integrated River Basin Science, Gansu Province, Lanzhou 730000, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Institute of Loess Plateau, Shanxi University, Taiyuan 030006, China;
    4. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2013-08-02 Revised:2013-12-29 Online:2014-02-25 Published:2014-03-18

摘要:

以河岔水文站以上的汾河流域为研究区,采用土地利用转移矩阵和SWAT模型模拟方法,就汾河上游土地利用变化对水文过程的影响进行研究. 流域从1995-2000年,以耕地向林地和草地转变为主;从2000-2010年,城市建设用地不断增加,主要是对耕地的占用. 结果显示,在相同气候背景、不同土地利用情景(1995、2000年2010年)下,流域1992-2000年多年平均产水量微弱增加(分别为85.69 mm、85.75 mm和85.82 mm),主要因为耕地持续减少,草地和城市建设用地不断增加. 但是各年产水量的大小关系不完全一致,枯水年和平水年与丰水年存在差异,而土壤水分呈现一致的减少状况. 子流域水平上,降水条件同样影响水文过程对土地利用变化的响应程度. 以上结果表明,汾河流域在退耕还林还草政策等影响下,土地利用发生变化并且直接影响流域的水文过程,但是流域水文过程对土地利用变化的响应还受到降水的影响.

关键词: 汾河上游, SWAT模型, 土地利用变化, 产水

Abstract:

To investigate the impact of land use change on the water yield in the upper reaches of the Fen River, the drainage basin above the Hecha Hydrological Station was selected as a case study area. Two approaches, including transfer matrix analyzing of land use and hydrological simulating with SWAT model, were applied. A transfer matrix analysis of the land use in this basin from 1995 to 2010 found that land use had characteristics of stage. From 1995 to 2000, the main land use change was transformation from farmland to forest and from farmland to grassland. From 2000 to 2010, the area of construction land had increased, which occupied the farmland. Using the calibrated SWAT model, the water yields of three land use scenarios were simulated under the same climate conditions from 1990 to 2000. The differences between their water yields were small, because the land use changes were not obvious from 1992 to 2000. The average annual water yield of the land use in 1995 was 85.69 mm, in the 2000 s was 85.75 mm and in the 2010 s was 85.82 mm. However, the water yield from year to year was inconformity, because there were less and normal precipitation years and more precipitation years, and the soil moisture declines as the land use change, indicating that the water yield of a basin is not only associated with land use, but also affected by precipitation. As regards to sub-basins, it was also found that precipitation affects the hydrologic response to the land use change in a basin. The above results show that under the replacing farmland with forest and grassland policy and social and economic development, land use in the Fen River basin were the transformations from farmland to forest, from farmland to grassland and from farmland to construction land. The changes could increase a small amount of runoff and decrease soil water, but the response of the watershed hydrological process to land use change is also depend on precipitation.

Key words: upper reaches of the Fen River, SWAT Model, land use change, water yield

中图分类号: 

  • P343.9