摘要
水源涵养作为重要的生态系统服务功能之一,对张家口和承德地区的生态系统及用水安全有着重要的意义。为了改进以往研究中对地形及土壤渗透性等考虑不足、对数据空间异质性分析不充分等问题,文章基于生态系统服务和权衡的综合评估模型(integrated valuation of ecosystem services and tradeoffs,InVEST),使用多种高精度的遥感、再分析数据等产品,对2001—2020年张承地区的水源涵养功能进行定量化评价及驱动因素分析。研究发现,2001—2020年张承地区水源涵养功能空间分布上呈现坝下高坝上低的特点,各年水源涵养功能的空间分布存在差异性的同时也具有一定的相似性。时间变化上,20年间水源涵养深度以-0.08 mm/a的平均速率呈下降波动趋势。结合Sen+Mann-Kendall分析发现区内水源涵养功能变化趋势以“基本不变”、“轻微增长”、“轻微降低”三者为主,总占比近98%。区内降水量对水源涵养功能具有很强的显著正相关关系,气温对水源涵养功能在部分地区具有显著负相关关系,植被与水源涵养功能的关系相对复杂。张承地区2020年林地的水源涵养功能最强,水源涵养深度达28.64 mm,总量而言,草地水源涵养功能的贡献最大,水源涵养量达1.12×10^(9)m^(3)。20年间变化中,耕地水源涵养量的降低最为明显,变化速率达-6.49×10^(6)m^(3)/a。上述结果说明张承地区20年间水源涵养功能的时空特征主要受到降水量与植被型土地利用的控制。研究为张承地区生态建设及水资源管理提供重要的决策依据。
As one of the important ecosystem service functions,water conservation function is of great significance to the ecosystem and water safety in the Zhangjiakou and Chengde districts.Based on the integrated valuation of ecosystem services and tradeoffs(InVEST)model,this study quantitatively evaluates the water conservation function and analyses its driving factors of the Zhang-Cheng district from 2001 to 2020 using high-quality remote sensing data and other reanalysis products,in order to improve the problems of insufficient consideration of topography and soil permeability,as well as the inadequate analyses of data spatial heterogeneity in previous studies.The results show that the spatial distribution of the water conservation function in the Zhang-Cheng district from 2001 to 2020 was characterized by high values in the Baxia areas and low values in the Bashang areas.Despite some differences,the spatial distribution of the water conservation function in each year had some similarities to some extent.In terms of the trend,the water conservation depth in these 20 years showed a fluctuating downward trend with an average rate of−0.08 mm/a.Combined with the Sen+Mann-Kendall analysis,the trend of the water conservation function in this area was mainly classified as"No trend","Slight increase"and"Slight decrease",accounting for nearly 98%of the total area.The results of correlation analysis show that precipitation had a strongly significantly positive correlation with water conservation function,temperature had a significantly negative correlation with water conservation function in some areas,and the correlation between vegetation and water conservation function was complex.In the Zhang-Cheng district in 2020,the woodland had the strongest water conservation function,and the water conservation depth reached 28.64 mm.On the other hand,the grassland water conservation function had the greatest contribution in the total amount,and the water conservation reached 1.12×10^(9)m^(3).During these 20 years,the water conservat
作者
马靖宣
金晓媚
张绪财
殷秀兰
金爱芳
MA Jingxuan;JIN Xiaomei;ZHANG Xucai;YIN Xiulan;JIN Aifang(School of Water Resources and Environment,China University of Geosciences(Beijing),Beijing 100083,China;China Institute of Geo-Environment Monitoring,Beijing 100081,China)
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2023年第3期54-64,共11页
Hydrogeology & Engineering Geology
基金
国家自然科学基金项目(41372250)
行政事业类专项项目(121201014000150003)。
