干旱区生态环境知识资源中心(Arid): Threats to soil and water resources in South Africa

Arid

DOI	10.1016/j.envres.2019.109015
	Threats to soil and water resources in South Africa
	du Preez, C. C.; van Huyssteen, C. W.
通讯作者	van Huyssteen, C. W.
来源期刊	ENVIRONMENTAL RESEARCH
ISSN	0013-9351
EISSN	1096-0953
出版年	2020
卷号	183
英文摘要	South Africa has always been subject to an arid climate, receiving only slightly more than half of the world's average precipitation. This precarious situation is further exacerbated by very high potential evapotranspiration and an extremely rapid population growth. This paper aims to evaluate the threats to the soil and water resources of South Africa. These resources are vital in ensuring sustainable food production. Physically, wind and water erosion, structural decay, subsoil compaction and soil surface crusting are of great concern. Chemically, acidification, salinization, and pollution are the main concerns; with acidification mainly limited to the humid eastern parts and salinization to the arid western parts of South Africa. Biological degradation is mainly driven by organic matter decline, reducing the already low soil organic carbon content of South African soils. The extent of organism decline and the concomitant pathogen increase is not that well-known. Water resources in South Africa are very limited and of variable certainty. Water use efficiency, especially in agriculture and forestry, should receive urgent attention, since these are the main consumers of this valuable resource. Sedimentation, salinization, and pollution constitute the main impacts on water quality. Water pollution arises mainly from point sources such as municipal effluent, with smaller impacts from industry and feedlots. Given the varied nature of institutions and role-players involved in soil and water degradation, it is vital that one or more national institutions take responsibility to monitor and at least attempt to rectify and/or manage the degradation of South Africa's soil and water resources. In this regard substantial financial support from the private sector would also be imperative.
英文关键词	Agricultural production Environmental protection Soil degradation Soil restoration Water quality Water use efficiency
类型	Article
语种	英语
国家	South Africa
收录类别	SCI-E
WOS记录号	WOS:000526177500095
WOS关键词	PRODUCTION MANAGEMENT-PRACTICES ; WHEAT RESIDUE MANAGEMENT ; ORGANIC-MATTER CONTENT ; LOWER VAAL RIVER ; CONSERVATION AGRICULTURE ; GRAZING GRADIENTS ; FERTILITY STATUS ; LAND-USE ; QUALITY ; DYNAMICS
WOS类目	Environmental Sciences ; Public, Environmental & Occupational Health
WOS研究方向	Environmental Sciences & Ecology ; Public, Environmental & Occupational Health
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314445
作者单位	Univ Free State Blemfontein, Blemfontein, South Africa
推荐引用方式 GB/T 7714	du Preez, C. C.,van Huyssteen, C. W.. Threats to soil and water resources in South Africa[J],2020,183.
APA	du Preez, C. C.,&van Huyssteen, C. W..(2020).Threats to soil and water resources in South Africa.ENVIRONMENTAL RESEARCH,183.
MLA	du Preez, C. C.,et al."Threats to soil and water resources in South Africa".ENVIRONMENTAL RESEARCH 183(2020).