• Journal of Natural Resources
  • Vol. 35, Issue 7, 1728 (2020)
Dong-qing LIU, Er-jia CAO, Jin-xi ZHANG, Jie GONG*, and Ling-ling YAN
Author Affiliations
  • Key Laboratory of Western China's Environmental Systems (Ministry of Education)/College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
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    DOI: 10.31497/zrzyxb.20200716 Cite this Article
    Dong-qing LIU, Er-jia CAO, Jin-xi ZHANG, Jie GONG, Ling-ling YAN. Spatiotemporal pattern of water conservation and its influencing factors in Bailongjiang Watershed of Gansu[J]. Journal of Natural Resources, 2020, 35(7): 1728 Copy Citation Text show less
    Location of the study area
    Fig. 1. Location of the study area
    The spatiotemporal distribution of WC in BLJW in 1990, 2002, 2016
    Fig. 2. The spatiotemporal distribution of WC in BLJW in 1990, 2002, 2016
    The distribution of WC in different counties and its influencing factors at BLJW
    Fig. 3. The distribution of WC in different counties and its influencing factors at BLJW
    The distribution of WC at different elevations and its influencing factors at BLJW
    Fig. 4. The distribution of WC at different elevations and its influencing factors at BLJW
    The distribution of WC in different slopes and its influencing factors at BLJW
    Fig. 5. The distribution of WC in different slopes and its influencing factors at BLJW
    The distribution of WC in different aspects and its influencing factors at BLJW
    Fig. 6. The distribution of WC in different aspects and its influencing factors at BLJW
    The distribution of WC in different land use types and its influencing factors at BLJW
    Fig. 7. The distribution of WC in different land use types and its influencing factors at BLJW
    The spatiotemporal variation of hotspots and coldspots of WC at BLJW
    Fig. 8. The spatiotemporal variation of hotspots and coldspots of WC at BLJW
    The annual precipitation and average annual temperature change at BLJW
    Fig. 9. The annual precipitation and average annual temperature change at BLJW
    The effects of meteorological factors and land use on WC at BLJW
    Fig. 10. The effects of meteorological factors and land use on WC at BLJW
    The contribution rate of each factor in the watershed and inner zones at BLJW
    Fig. 11. The contribution rate of each factor in the watershed and inner zones at BLJW
    The contribution rate of two-factor interactive in the watershed and inner zones at BLJW
    Fig. 12. The contribution rate of two-factor interactive in the watershed and inner zones at BLJW
    所需数据本地化处理
    土地利用下载自美国地质调查局的30 m空间分辨率的Landsat TM/ETM+遥感影像;参考《土地利用现状分类标准》(GB/T 21010-2007)并结合研究区实际情况,对1990—2016年三期影像进行目视解译获得
    降水根据中国气象科学数据共享服务网(http://data.cma.cn)、流域及流域周边各县区气象局18个站点的1990—2016年月降水量进行空间插值获得
    潜在蒸散基于采用Modified-Hargreaves公式计算,其中所需数据包括1990—2016年各气象站点的日最高气温、日最低气温和太阳顶层辐射等
    (子)流域基于DEM数据在ArcSWAT平台上提取
    土壤深度基于甘肃第二次土壤普查数据,并结合野外土壤样点剖面数据得到
    根系深度参考相关研究成果[16],以土地利用/覆被类型为单元构建根系深度CSV表格
    植物可利用水基于甘肃省土壤普查数据,PAWC为田间持水量和永久萎蔫系数的差值,两者分别由经验公式计算[25]
    径流系数参考模型参数表数据
    地形指数根据土壤深度、百分坡度和汇水面积计算获得
    土壤饱和导水率采用流域实测的土壤粘粒、粉粒和粗砂百分比含量在Wosten模型中计算获得
    DEM从USGS官网(https://www.usgs.gov)上获取,空间分辨率为30 m
    NDVIMOD13Q1卫星数据,空间分辨率为250 m
    人口密度、粮食单产量单位面积载畜量根据甘肃省基础地理信息中心提供的乡镇边界对各县区统计年鉴中的人口、农牧业信息进行空间可视化
    综合景观破碎度以边缘密度ED、蔓延多样性SHDI和蔓延度指数CONTAD的综合指标插值获得[26]
    土地利用强度在乡镇单元上根据土地利用强度指数计算获得[27]
    Table 1. Data sources and localization processing
    社会生态指标流域高值区低值区
    流域东南部迭部东南部武都中北部宕昌北部
    水源涵养量/mm48.8059.4455.6529.1022.02
    气候降水/mm549.45583.26575.65523.41514.29
    温度/C°12.1615.549.2114.619.50
    地形高程/m2323.211606.712934.341987.472554.57
    坡度/(°)26.2829.3029.7025.6418.24
    土壤类型(比例/%)棕壤(29.96)
    暗棕壤(17.78)
    棕壤(47.85)
    黄棕壤(25.56)
    棕壤(37.38)
    暗棕壤(31.95)
    淋溶褐土(25.11)
    石灰性褐土(22.91)
    黑土(59.08)
    淡黑钙土(22.77)
    自然
    景观
    主要地类
    (比例/%)
    林地(53.12)
    草地(29.81)
    林地(76.22)
    草地(12.48)
    林地(56.20)
    草地(35.34)
    草地(47.33)
    耕地(27.06)
    耕地(52.27)
    草地(33.18)
    植被覆盖度0.540.670.560.480.43
    ED23.4121.4021.5221.1230.20
    SHDI0.880.680.910.970.96
    CONTAD66.8974.0065.9264.9863.21
    农牧业发展人口密度/(人/km2)88.7442.7311.25178.64167.93
    各乡镇农作物单产(t/km2)34.0015.063.9470.3665.16
    各乡镇载畜量
    (头/km2)
    66.6441.4463.73109.5751.75
    Table 2. The regional differences of socio-ecological elements at BLJW
    年份降水潜在蒸散用地强度NDVI景观破碎度人口密度
    19900.575**-0.196-0.839**0.571**-0.313**-0.609**
    20020.699**-0.250*-0.842**0.859**-0.305**-0.485**
    20160.189-0.144-0.938**0.909**-0.411**-0.591**
    Table 3. The static influencing factors of WC at BLJW
    时段/年降水变化潜在蒸散变化用地强度变化NDVI变化景观破碎度变化人口密度变化
    1990—20020.215*-0.214*-0.538**-0.1850.030.182
    2002—20160.595**0.042-0.315**0.163-0.377**-0.018
    Table 4. The dynamic influencing factors of WC at BLJW
    Dong-qing LIU, Er-jia CAO, Jin-xi ZHANG, Jie GONG, Ling-ling YAN. Spatiotemporal pattern of water conservation and its influencing factors in Bailongjiang Watershed of Gansu[J]. Journal of Natural Resources, 2020, 35(7): 1728
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