长江科学院院报 ›› 2023, Vol. 40 ›› Issue (5): 44-50.DOI: 10.11988/ckyyb.20211405

• 水资源 • 上一篇    下一篇

土地利用及气候变化对桐梓河流域水文要素空间分布的影响

郑婷婷, 蔡宏, 刘家威   

  1. 贵州大学 矿业学院,贵阳 550025
  • 收稿日期:2021-12-28 修回日期:2022-03-14 出版日期:2023-05-01 发布日期:2023-05-22
  • 通讯作者: 蔡宏(1980-),女,甘肃金昌人,副教授,博士,主要从事资源环境遥感方面的研究。E-mail:hcai@gzu.edu.cn
  • 作者简介:郑婷婷(1989-),女,山东济宁人,工程师,硕士,研究方向为水环境遥感。E-mail:2879740966@qq.com
  • 基金资助:
    国家自然科学基金项目(41901225)

Effects of Land Use and Climate Change on Spatial Distribution of Hydrological Factors in Tongzi River Basin

ZHENG Ting-ting, CAI Hong, LIU Jia-wei   

  1. Mining College of Guizhou University,Guiyang 550025,China
  • Received:2021-12-28 Revised:2022-03-14 Online:2023-05-01 Published:2023-05-22

摘要: 基于SWAT模型构建了桐梓河流域水文分布模型,通过设置4种情景模式,定量分析了土地利用和气候变化对流域各水文要素空间分布的影响。结果显示:①SWAT模型月径流模拟,率定期和验证期的R2和NS系数均达到0.83以上,表明SWAT模型在研究区的适用性较好。②桐梓河流域多年平均径流深最大、地下径流量大、产水量大的子流域都分布在流域南部,这与流域南部地表坡降大、降水集中有关;而径流深与地表径流、土壤含水量等水文要素的分布不一致,故不能用径流深来代替各水文要素的空间分布特征。③土地利用与气候共同变化情景下各水文要素空间分布变化趋势与气候变化情景下大体一致。研究结果可为桐梓河流域水资源的合理开发利用提供科学依据。

关键词: 土地利用, 气候变化, 水文要素, 空间分布, SWAT, 桐梓河流域

Abstract: The Soil and Water Assessment Tool (SWAT) hydrological distribution model of Tongzi River Basin was established with four scenarios to quantify the effects of land use and climate change on the spatial distribution of hydrological factors in the basin. Results demonstrate that: 1) The SWAT model is well applicable to the Tongzi River Basin as the R2 and NS coefficient of monthly runoff simulation reach over 0.83 in both calibration period and validation period.2) The sub-basins with the largest annual average runoff depth, large underground runoff and large water yield all distribute in the south part of the Tongzi River Basin where surface slope gradient is large and precipitation is concentrated. However, runoff depth cannot be used to replace hydrological factors because the distribution of runoff depth does not conform with those of surface runoff, soil moisture content and other hydrological factors.3) The spatial distribution trend of hydrological factors under both land use and climate changes is generally consistent with that under the climate change scenario.The research findings offer scientific basis for the rational development and utilization of water resources in Tongzi River Basin.

Key words: land use, climate change, hydrological factor, spatial distribution, SWAT, Tongzi River Basin

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