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InVEST模型在市县级水源涵养功能评价中的应用——以广东省广州市为例
陈德权1, 兰泽英2, 陈晓辉2, 李玮麒2, 周园1, 唐玲1, 汪润芝1
1.广东省海洋发展规划研究中心, 广东 广州 510220;2.广东工业大学 管理学院, 广东 广州 510520
摘要:
[目的] 评估InVEST模型应用在市县级水源涵养功能重要性评价的适用性,探析以海绵城市建设试点且高度城市化的广东省广州市水源涵养服务时空变化特征与区域差异,为区域社会经济发展、生态环境保护与恢复政策的制定提供理论依据。[方法] 利用对比分析法分别评估InVEST水源涵养评估模型与相关“指南”——《资源环境承载能力和国土空间开发适宜性评价技术“指南”》推荐模型在区域水源涵养服务相关结果评价中的精确性,并利用GIS空间分析方法分析2013—2017年广州市的水源涵养服务时空分异特征。[结果] ①基于InVEST的水源涵养评估模型评估结果精度高,水源涵养功能重要性评价结果同样符合要求。②广州市水源涵养总量呈现先升后降,总体保持一定增长的态势,高值集中在水域和东北部多林地区域,低值集中在城市中心建成区。③区域整体水源涵养功能提升,但不同行政区划和地类存在差异,行政区中海珠区、番禺区和荔湾区提升较大;地类中耕地和建设用地有所提升,林地基本不变,而草地有所减弱。④各水源涵养功能重要性分区面积比例接近,但各分区内部不同地类比例存在差异。[结论] ①基于InVEST的水源涵养评估模型相比“指南”模型准确性更高,在规划领域具有很好的应用前景。②广州市水源涵养量空间分异明显,2013—2017年整体水源涵养功能提升。
关键词:  水源涵养  模型验证  时空变化  InVEST模型  广州市
DOI:10.13961/j.cnki.stbctb.2021.04.028
分类号:X171.1
基金项目:国家自然科学基金项目“地学知识协同蚁群智能计算的土地利用高分辨率遥感影像分类”(41301377)
Application of InVEST Model in Evaluation of Water Conservation Function at City and County-level—A Case Study in Guangzhou City, Guangdong Province
Chen Dequan1, Lan Zeying2, Chen Xiaohui2, Li Weiqi2, Zhou Yuan1, Tang Ling1, Wang Runzhi1
1.Research Centre for the Marine Development and Planning of Guangdong Province, Guangzhou, Guangdong 510220, China;2.Guangdong University of Technology, Guangzhou, Guangdong 510520, China
Abstract:
[Objective] The applicability of the InVEST model in the evaluation of the importance of water conservation functions at the city and county level was assesssed, and the spatiotemporal characteristics and regional differences of water conservation services in Guangzhou City, Guangdong Province was analyzed, in order to provide a theoretical basis for regional socio-economic development and the formulation of ecological environmental protection and restoration policies. [Methods] Using comparative analysism, the accuracy of InVEST water conservation evaluation model and related guidelines (Technical Guide for Carrying Capacity of Resources and Environment and Suitability Evaluation of Land Spatial Development) recommended model in regional water conservation services was evaluated. And GIS spatial analysis method was used to analyze the spatial and temporal analysis of water conservation service in Guangzhou City from 2013 to 2017. [Results] ① The evaluation results of the water conservation evaluation model based on InVEST were highly accurate, and the evaluation results of the importance of water conservation functions also met the requirements. ② The total amount of water conservation in Guangzhou City increased first and then decreased, and maintained a certain growth trend. The high values were concentrated in the water area and the forested area in the northeast, while the low values were concentrated in the built-up area of the city center. ③ The overall water conservation function had been improved, but differences existed among different administrative divisions and land types. The administrative regions of Haizhu District, Panyu District and Liwan District had increased greatly, the cultivated land and construction land had been improved, forest land had remained unchanged basically, while grassland had been weakened. ④ The proportion of area of water conservation function importance zone was similar, but the proportion of different land types within each zone was different. [Conclusion] ① Compared with the guide model, the water conservation assessment model based on InVEST is more accurate and has a good application prospect in the field of planning. ② The spatial differentiation of water conservation in Guangzhou City is obvious, and the overall water conservation function has been improved from 2013 to 2017.
Key words:  water conservation  model validation  temporal and spatial changes  InVEST model  Guangzhou City