河西地区2000—2020年植被生态需水量估算  

Estimation of vegetation ecological water demand in Hexi region

作　　者：王同红 王旭峰 杨彦鹏 李宗省 车涛 WANG Tong-hong;WANG Xu-feng;YANG Yan-peng;LI Zong-xing;CHE Tao(Northwest Institute of Eco-Environmental Resources,Chinese Academy of Sciences,Lanzhou 730000,Gansu,China;School of Geography and Environmental Sciences,Northwest Normal University,Lanzhou 730070,Gansu,China)

机构地区：[1]中国科学院西北生态环境资源研究院,甘肃兰州730000 [2]西北师范大学地理与环境科学学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2024年第4期12-25,共14页Journal of Northwest Normal University(Natural Science)

基　　金：甘肃省杰出青年基金资助项目(22JR5RA046);甘肃省科技重大专项(23ZDKA004);国家自然科学基金-区域联合基金重点项目(U22A202690)。

摘　　要：植被生态需水量的准确估算不仅关乎水资源的合理开发与管理,而且为科学制定生态环境保护与修复政策提供基础支持.本研究探讨应用不同方法估算河西地区植被生态需水量的精度与适用性.通过收集河西地区11个通量观测站的植被耗水观测数据,对植被生态需水模型进行验证和标定,选取适合该地区的估算模型——植被覆盖度修正蒸散发法,结合野外观测数据和卫星遥感数据,对2000—2020年河西地区的植被生态需水量进行估算.结果显示,河西地区2000—2020年植被生态需水量为(173.86±6.10)×10^(8)m^(3),在空间上呈现出东南高、西北低的分布格局.随着植被覆盖度以每年0.002的速率显著增加,植被生态需水量呈现出以每年0.70×10^(8)m^(3)的速率显著增加的趋势.本研究为河西地区植被生态需水量的准确估算和深入分析提供科学依据,同时也为未来相关研究提供参考和借鉴.Accurate estimation of vegetation ecological water demand is essential not only for the rational development and management of water resources but also for providing a foundation for scientifically formulating policies for ecological environmental protection and restoration.This study aims to explore the accuracy and applicability of different methods for estimating vegetation ecological water demand in the Hexi region and to conduct such an estimation based on these methods.By collecting vegetation water consumption data from 11 flux observation stations in the Hexi region,vegetation ecological water demand models are validated and calibrated,and the Vegetation Cover-Corrected Evapotranspiration method is selected as the suitable model for this region.Combining field observation data with satellite remote sensing data,the vegetation ecological water demand in the Hexi region is estimated from 2000 to 2020.The results show that the vegetation ecological water demand in the Hexi region from 2000 to 2020 was 173.86±6.10×10^(8)m^(3),exhibiting a spatial distribution pattern of high in the southeast and low in the northwest.With a significant annual increase in vegetation coverage at a rate of 0.002,the vegetation ecological water demand also showed a significant increasing trend at a rate of 0.70×10^(8)m^(3)per year.This study provides a scientific basis for the accurate estimation and in-depth analysis of vegetation ecological water demand in the Hexi region and offers references and insights for future related research.

关 键 词：干旱区 河西地区 植被生态需水量 水资源 植被覆盖度修正蒸散发法 

分 类 号：P942.71[天文地球—自然地理学] Q948.1[生物学—植物学]