气候变化领域集成服务门户(CCPortal): Do we prioritize floodplains for development and farming? Mapping global dependence and exposure to inundation

CCPortal

DOI	10.1016/j.gloenvcha.2021.102370
	Do we prioritize floodplains for development and farming? Mapping global dependence and exposure to inundation
	Dryden R.; Anand M.; Lehner B.; Fluet-Chouinard E.
发表日期	2021
ISSN	0959-3780
卷号	71
英文摘要	Global wetlands and floodplains offer benefits and perils alike for human society. For example, humans rely on natural flood cycles for fisheries and agriculture, yet flooding also caused nearly one trillion USD in damage in the past 30 years and impacts millions of people every year. Looking forward, altered flow regimes or increased drought conditions are expected to affect the natural inundation cycle and its ecosystem services. The current and potential future impacts of flooding and drying events warrant increasing efforts to quantify our dependence and exposure within flooded areas, since any change from current inundation patterns is expected to have consequences for those who rely on regular flood occurrences. This paper provides a baseline global assessment of the dependence and exposure of human populations, urban areas, roads, and agriculture on current inundation patterns. The analysis uses a spatially explicit inundation map at ∼500 m resolution (GIEMS-D15) derived from satellite remote sensing to represent flooding extents and overlays it with current population and land use maps. We find that 35% of the analyzed population, or 2.0 billion people, live inside areas that are prone to inland flooding, which comprise only 12% of the land surface area (excluding marine coastal areas), confirming that population densities within inundation zones are about three-times above global average. Likewise, 35% of urban areas potentially experience regular, seasonal, or infrequent flooding. Agriculture shows a similar pattern with 24% of the world's cropland in areas of recurring inundation. Finally, we estimate that 18% of the global road network is exposed to inundation during high water periods. These global estimates demonstrate a preferential tendency of human populations, infrastructure, and agriculture to be co-located within inundation areas, making related anthropogenic activities highly susceptible to future changes in flood regimes. The results are intended to offer a suite of first-order estimates as partial input to more holistic risk and vulnerability assessments and to ultimately improve environmental planning and policy at large scales. © 2021 Elsevier Ltd
关键词	Agriculture Dependence Exposure Floodplain Inundation Population
语种	英语
scopus关键词	environmental planning; farming system; flood; flooding; floodplain; global perspective; land surface; mapping method; remote sensing; vulnerability
来源期刊	Global Environmental Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/249569
作者单位	Department of Geography, McGill University, 805 Sherbrooke Street West, Montréal, Québec H3A 0B9, Canada; RAND Corporation, 4570 Fifth Ave #600, Pittsburgh, PA 15213, United States; Center for Limnology, University of Wisconsin-Madison, 680 North Park Street, Madison, WI 53706, United States
推荐引用方式 GB/T 7714	Dryden R.,Anand M.,Lehner B.,et al. Do we prioritize floodplains for development and farming? Mapping global dependence and exposure to inundation[J],2021,71.
APA	Dryden R.,Anand M.,Lehner B.,&Fluet-Chouinard E..(2021).Do we prioritize floodplains for development and farming? Mapping global dependence and exposure to inundation.Global Environmental Change,71.
MLA	Dryden R.,et al."Do we prioritize floodplains for development and farming? Mapping global dependence and exposure to inundation".Global Environmental Change 71(2021).