| 摘要: |
| 承德市御道口地区作为京津冀水源涵养功能区的组成部分，是区域可持续发展的重要生态支撑。基于生态系统服务和权衡的综合评估模型（InVEST模型）定量分析了1990—2020年御道口地区的产水与水源涵养功能的时空演变，并采用情景模拟法分析评估气候要素与土地利用类型变化对产水量与水源涵养量的影响。结果表明：（1）1990—2020年，御道口地区平均产水深度与水源涵养深度分别为103.26，81.66 mm，产水量与水源涵养量呈现先减小后增加的波动变化趋势；空间均呈现东北高西南低的分布特征，高值区主要集中于东北林、草地区域，低值区则主要集中于未利用地与西南部耕地区域；（2）各气候要素中，产水深度、水源涵养深度与降水量呈正相关关系，与潜在蒸、散发量呈负相关关系；各土地利用类型中，草地的平均产水量贡献率最大（51.23%），林地的平均水源涵养量贡献率最大（50.77%）；（3）1990—2020年，气候与土地利用变化对产水量变化的年平均贡献率分别为94.99%和5.01%，对水源涵养量变化的年平均贡献率分别为92.21%和7.79%，气候变化是御道口地区产水、水源涵养功能时空演变的主导因素，而土地利用变化的影响正在逐渐增强。 |
| 关键词: 产水量 水源涵养量 气候变化 土地利用变化 生态系统服务和权衡的综合评估模型 承德市 御道口地区 |
| DOI： |
| 分类号:X830 |
| 基金项目:承德国家可持续发展议程创新示范区建设科技专项项目（202007F005）；承德市科技支撑计划项目（201904A054）；河北民族师范学院博士启动基金（DR2019001） |
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| Analysis on the Spatiotemporal Characteristics of Water Yield and Water Conservation Functions in Yudaokou Area of Chengde City from 1990 to 2020 |
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WANG Ye， YANG Yue， XUE Zhongcaiet al1,2,3
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1. Colloge of Resources and Environmental Sciences， Hebei Normal University for Nationalities， Chengde，Hebei 067000， China;2.Key Laboratory of Mountain Geological Environment of Hebei Province， Chengde， Hebei 067000， China;3.Agriculture and Animal Husbandry Technology Promotion Center， Yudaokou Ranch Management Area， Chengde City， Chengde， Hebei 067000， China
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| Abstract: |
| As an integral part of the Beijing Tianjin Hebei water conservation functional area， the Yudaokou area of Chengde City is an important ecological support for the sustainable development of the region Based on the InVEST model(Integrated Valuation of Ecosystem Services and Trade offs)， this study quantitatively analyzes the temporal and spatial evolution of water yield and water conservation in Yudaokou area from 1990 to 2020， and uses scenario simulation to analyze and evaluate the impact of climatic factors and land use changes on water yield and water conservation The results showed as follows: (1) From 1990 to 2020， the average water production depth and water conservation depth in Yudaokou area were 103.26 and 81.66 mm respectively， and the water production and water conservation capacity showed a fluctuating trend of decreasing first and then increasing; The spatial distribution characteristics of them were high in the northeast and low in the southwest The high value areas were mainly concentrated in the northeast forest and grassland areas， while the low value areas were mainly concentrated in the unused land and the southwest cultivated land areas (2) Among the climatic factors， the water yield， water conservation and precipitation were positively correlated， while the potential evapotranspiration was negatively correlated; Among all land use types， the average water yield contribution rate of grassland was the largest (51.23%)， and the average water conservation contribution rate of forest land was the largest (50.77%) (3) From 1990 to 2020， the average annual contribution rates of climate and land use change to water yield change were 9499% and 501% respectively， and the average annual contribution rates to water conservation change were 92.21% and 7.79% respectively Climate change is the leading factor for the space time evolution of water production and water conservation function in Yudaokou area， while the impact of land use change is gradually increasing. |
| Key words: Water yield Water conservation Climate change Land use change InVEST model Chengde City Yudaokou area |
