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基于InVEST模型的大连市产水量时空变化分析
吕乐婷, 任甜甜, 李赛赛, 韩月驰
辽宁师范大学 城市与环境学院, 辽宁 大连 116029
摘要:
[目的]研究大连市产水量的时空分布特征和影响因子,为该市水资源的开发与保护提供可视化的评估结果和依据。[方法]基于InVEST模型的产水量模块,探究1980-2015年大连市降雨、气温、潜在蒸散、实际蒸散及土地利用状况变化特征,定量研究1980-2015年大连市产水量的时空分布特征及其成因。[结果]①1980-2015年期间大连市年均降水和潜在蒸散发不显著下降,年均气温和干燥系数显著增加,年均实际蒸散量显著下降。②研究期间大连市耕地、林地面积有所减少。城市建设用地面积有所增加,主要由耕地转移而来。其他用地类型面积变化较小。③研究区平均产水量为226.36 mm,产水总量2.70×109 m3。空间上由东北向西南递减。庄河市年均产水总量最大,达到1.10×109 m3。[结论]研究区产水量的变化是气候变化和土地利用共同作用的结果。气候变化是影响产水量变化的主要驱动力,土地利用变化对产水量的增加有轻微影响。
关键词:  生态系统  产水量  InVEST模型  大连市
DOI:10.13961/j.cnki.stbctb.2019.04.023
分类号:K903
基金项目:辽宁省社会科学规划基金项目"1980-2018年辽宁省生态水源涵养服务价值时空动态变化分析"(L18CJY006);国家自然科学基金项目"流域景观格局对非点源污染影响的定量评估:以辽宁省汤河流域为例"(41701208)
Analysis on Spatio-temporal Variation of Water Supply in Dalian City Based on InVEST Model
Lü Leting, Ren Tiantian, Li Saisai, Han Yuechi
Urban and Environmental Science, Liaoning Normal University, Dalian, Liaoning 116029, China
Abstract:
[Objective] The spatial and temporal distribution characteristics and influencing factors of the water supply in Dalian City of Liaoning Province were studied in order to provide visual evaluation results and a basis for the development and protection of water resources.[Methods] Based on the InVEST model, the characteristics of rainfall, air temperature, potential evapotranspiration, actual evapotranspiration, and land use in Dalian City from 1980 to 2015 were investigated. Quantitative estimation of spatial and temporal distribution characteristics and causes of water supply in Dalian City from 1980 to 2015 were also analyzed.[Results] ① From 1980 to 2015, the average annual precipitation and potential evapotranspiration of Dalian City did not decrease significantly, the average annual temperature and drying coefficient increased significantly, and the annual actual evapotranspiration decreased significantly. ② The area of cultivated land and woodland decreased, the area of urban construction land transferring from increased, and the area of other land types had less change. ③ The average water supply was 226.36 mm and the total water production was 2.70×109 m3. It showed a trend of decreasing form the northeast to the southwest. The annual water production in Zhuanghe City was the largest, reaching 1.10×109 m3.[Conclusion] The change of water supply was resulted from both climate change and land use. Climate change was the main driving force for water supply change, and land use change had some slight effects on the increase of water supply.
Key words:  ecosystem  water supply  InVEST model  Dalian City