气候变化领域集成服务门户(CCPortal): Shoreline retreat and beach nourishment are projected to increase in Southern California

CCPortal

DOI	10.1038/s43247-024-01388-6
	Shoreline retreat and beach nourishment are projected to increase in Southern California
	Amrouni, Oula; Heggy, Essam; Hzami, Abderraouf
发表日期	2024
EISSN	2662-4435
起始页码	5
结束页码	1
卷号	5 期号:1
英文摘要	Sandy beaches in Southern California are experiencing rising coastal erosion due to changes in precipitation patterns and urban growth. As a result, beach nourishment is necessary for mitigation. In our study, we forecast the rates of shoreline retreat and the required volumes of sand nourishment to mitigate it for the coming decades. We employ photogrammetric multi-decadal shoreline positioning and Digital Shoreline Analysis System methods to measure and predict the coastal evolution of the Gulf of Santa Catalina in Southern California. This region is hypothesized to be globally representative of other semi-arid sandy coasts facing similar hydroclimatic and anthropogenic challenges. Our findings indicate that Southern California's shoreline retreat rates for sandy beaches will increase from the present average value of similar to-1.45 to -2.12 meters per year in 2050 and to -3.18 meters per year in 2100. Consequently, the annual volume of sand required for beach nourishment could triple by 2050, increasing from the present-day amount of similar to 1223 to similar to 3669 cubic meters per year per kilometer. However, the associated cost for this nourishment will grow five times, exacerbating several coastal communities' economic and logistical pressures. Similar trends are emerging globally, with semi-arid developing nations already grappling with coastal hazards and may struggle to manage the escalating costs of curbing beach nourishment.
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001229419800004
来源期刊	COMMUNICATIONS EARTH & ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/296414
作者单位	Institut National des Sciences et Technologies de la Mer; Universite de Carthage; University of Southern California; National Aeronautics & Space Administration (NASA); NASA Jet Propulsion Laboratory (JPL); California Institute of Technology
推荐引用方式 GB/T 7714	Amrouni, Oula,Heggy, Essam,Hzami, Abderraouf. Shoreline retreat and beach nourishment are projected to increase in Southern California[J],2024,5(1).
APA	Amrouni, Oula,Heggy, Essam,&Hzami, Abderraouf.(2024).Shoreline retreat and beach nourishment are projected to increase in Southern California.COMMUNICATIONS EARTH & ENVIRONMENT,5(1).
MLA	Amrouni, Oula,et al."Shoreline retreat and beach nourishment are projected to increase in Southern California".COMMUNICATIONS EARTH & ENVIRONMENT 5.1(2024).