气候变化领域集成服务门户(CCPortal): Viability of investing in ecological infrastructure in South Africa's water supply areas

CCPortal

DOI	10.17159/sajs.2024/17378
	Viability of investing in ecological infrastructure in South Africa's water supply areas
	Webster, Kayla M. E.; Turpie, Jane K.; Letley, Gwyneth K.
发表日期	2024
ISSN	0038-2353
EISSN	1996-7489
起始页码	120
结束页码	5-6
卷号	120 期号:5-6
英文摘要	Ecological infrastructure (natural ecosystems that provide important services and save on built infrastructure costs) can have an important role in securing water supply, particularly in water-scarce areas, but this importance is not reflected in investment decisions, partly due to a lack of evidence. In South Africa, one of the main threats to water supply is the proliferation of woody invasive alien plants which significantly reduce stream flow and water yields. We used existing spatial data and estimates of the impact of woody invasive plants on flows and water yields and on restoration costs to analyse the viability of investing in ecological infrastructure at the scale of major water supply areas. The analysis involved comparison of the costs and effects on water yields of catchment restoration with those of planned built infrastructure interventions designed to meet increasing water demands in the medium to long term. The cost-effectiveness analysis used the unit reference value as a measure of comparison, which is based on the discounted flows of costs and water supplied over a defined time. Restoration could supply 24% of the combined yield of planned built infrastructure interventions by 2050, and is not only cost-effective but has the added advantage of a range of co-benefits delivered by improving ecosystem health. This finding suggests that investing in ecological infrastructure should be considered ahead of new built-infrastructure projects.
英文关键词	ecological infrastructure invasive; alien plants water security,; ecosystem health cost-effectiveness; analysis
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001236142300012
来源期刊	SOUTH AFRICAN JOURNAL OF SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/298714
作者单位	University of Cape Town; University of Cape Town
推荐引用方式 GB/T 7714	Webster, Kayla M. E.,Turpie, Jane K.,Letley, Gwyneth K.. Viability of investing in ecological infrastructure in South Africa's water supply areas[J],2024,120(5-6).
APA	Webster, Kayla M. E.,Turpie, Jane K.,&Letley, Gwyneth K..(2024).Viability of investing in ecological infrastructure in South Africa's water supply areas.SOUTH AFRICAN JOURNAL OF SCIENCE,120(5-6).
MLA	Webster, Kayla M. E.,et al."Viability of investing in ecological infrastructure in South Africa's water supply areas".SOUTH AFRICAN JOURNAL OF SCIENCE 120.5-6(2024).