globalchange  > 气候变化与战略
DOI: 10.1016/j.jhydrol.2020.124581
论文题名:
Modeling the impacts of urbanization on watershed-scale gross primary productivity and tradeoffs with water yield across the conterminous United States
作者: Li C.; Sun G.; Cohen E.; Zhang Y.; Xiao J.; McNulty S.G.; Meentemeyer R.K.
刊名: Journal of Hydrology
ISSN: 221694
出版年: 2020
卷: 583
语种: 英语
英文关键词: Carbon balance ; Causal analysis ; Ecosystem model ; Urban sprawl ; Water balance
Scopus关键词: Climate change ; Ecosystems ; Land use ; Photosynthesis ; Phytoplankton ; Soil conservation ; Urban growth ; Water conservation ; Water management ; Water supply ; Watersheds ; Carbon balance ; Causal analysis ; Ecosystem model ; Urban sprawl ; Water balance ; Environmental impact ; carbon balance ; chlorophyll ; ecosystem modeling ; evapotranspiration ; human activity ; land cover ; net primary production ; trade-off ; urban sprawl ; urbanization ; water flux ; water yield ; watershed ; United States
英文摘要: The objective of this study was to examine the impacts of urbanization on gross primary productivity (GPP) and the interactions between carbon and water fluxes, including precipitation, evapotranspiration (ET), and water yield (Q). A water-centric ecosystem model, Water Supply Stress Index model (WaSSI) that operates at the 12-digit (81,900 watersheds) Hydrologic Unit Code (HUC) scale for the conterminous United States (CONUS) during 2000–2010, 2000–2050, and 2000–2100 was used. Linear regression and causal-based models were then applied to identify key factors controlling urbanization impact on GPP. Simulations of GPP patterns compared favorably with a global, 0.05-degree product of solar-induced chlorophyll fluorescence (SIF). We found that total CONUS GPP declined from 8.68 Pg C yr−1 in 2000, to 8.54 Pg C yr−1 in 2010, to 8.36 Pg C yr−1 in 2050, and to 8.13 Pg C yr−1 in 2100. Total GPP decreased from 6.81 Pg C yr−1 to 6.26 Pg C yr−1 for those watersheds affected by urbanization (~55,000). Total CONUS Q increased from 2.03 × 106 million m3 yr−1 in 2000, to 2.04 × 106 million m3 yr−1 in 2010, to 2.06 × 106 million m3 yr−1 in 2050, and 2.09 × 106 million m3 yr−1 in 2100, while Q increased from 1.68 × 106 million m3 yr−1 to 1.74 × 106 million m3 yr−1 for urbanized watersheds alone (~55,000). Although total CONUS ΔGPP was less than 0.55 Pg C yr−1, or <8%, large changes (ΔGPP >300 g C m−2 yr−1) were found in 245, 1984, and 5655 of the 81,900 watersheds by 2010, 2050 and 2100, respectively. Overall, the impacts of urbanization on GPP in the CONUS were influenced by background climate, previous land cover characteristics, and the magnitudes of land use change. Effective integrated watershed management that attempts to minimize the negative ecological and environmental impacts of urbanization must consider regional hydrologic differences and fit local climatic and watershed conditions. © 2020
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被引频次[WOS]:25   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158555
Appears in Collections:气候变化与战略

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作者单位: Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-Environmental Science & Technology, Guangzhou, 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou, 510650, China; Eastern Forest Environment Threat Assessment Center, USDA Forest Service, Research Triangle ParkNC 27709, United States; Center for Geospatial Analytics, North Carolina State University, Raleigh, NC 27606, United States; Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, NC 27606, United States; College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; Earth Systems Research Center, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824, United States

Recommended Citation:
Li C.,Sun G.,Cohen E.,et al. Modeling the impacts of urbanization on watershed-scale gross primary productivity and tradeoffs with water yield across the conterminous United States[J]. Journal of Hydrology,2020-01-01,583
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