Browsing Faculty of Natural Sciences by Author "Xu, Yongxin"
Now showing items 21-33 of 33
-
Review: groundwater management and groundwater/surface-water interaction in the context of South African water policy
Levy, Jonathan; Xu, Yongxin (Springer Verlag, 2011)Groundwater/surface-water interaction is receiv¬ing increasing focus in Africa due to its importance to ecologic systems and sustainability. In South Africa's 1998 National Water Act (NWA), water-use licenses, including ... -
Review: Groundwater recharge estimation in northern China karst regions
Shen, Haoyong; Xu, Yongxin; Liang, Yongping (Institute for Ionics, 2023)Reliable estimates of groundwater recharge are crucial for the groundwater resources evaluating and sustainable utilization plans formulating. To protect the precious karst groundwater resources, this paper critically ... -
The role of ground water in Sub-Saharan Africa
Braune, Eberhard; Xu, Yongxin (Wiley-Blackwell, 2010)Although water resources managers speak of a water crisis in Africa, the management of ground water has to date not featured strongly in national and regional African water agendas. Examination of the physical environment of ... -
Salinity of irrigation water in the Philippi farming area of the Cape Flats, Cape Town, South Africa
Aza-Gnandji, Ruben C.D.; Xu, Yongxin; Raitt, Lincoln; Levy, Jonathan (Water Research Commission, 2013)This paper explores the nature, source and spatial variation of the salinity of water used for irrigation in a coastal urban farming area in Cape Town, South Africa, where water from the Cape Flats aquifer is drawn into ... -
Scenarios analysis using water-sensitive urban design principles: A case study of the Cape Flats Aquifer in South Africa
Gxokwe, Siyamthanda; Xu, Yongxin; Kanyerere, Thokozani (Springer, 2020)A feasibility assessment was undertaken on the application ofwater-sensitive urban design (WSUD) for the Cape Flats Aquifer in Cape Town, South Africa, at the local scale. The study contributes towards the planning of ... -
Scenarios analysis using water-sensitive urban design principles: A case study of the Cape Flats Aquifer in South Africa
Gxokwe, Siyamthanda; Xu, Yongxin; Kanyerere, Thokozani (Springer, 2020)A feasibility assessment was undertaken on the application ofwater-sensitive urban design (WSUD) for the Cape Flats Aquifer in Cape Town, South Africa, at the local scale. The study contributes towards the planning of ... -
Snow impact on groundwater recharge in Table Mountain Group aquifer systems with a case study of the Kommissiekraal River catchment South Africa
Wu, Yong; Xu, Yongxin (Water Research Commission, 2005)Snowmelt in the mountainous areas of the Table Mountain Group (TMG) in South Africa is believed to be one of sources of groundwater recharge in some winter seasons. This paper provides a scientific assessment of snow ... -
Spatiotemporal green water dynamics and their responses to variations of climatic and underlying surface factors: A case study in the Sanjiang Plain, China
Xu, Chi; Zhang, Wanchang; Xu, Yongxin (Elsevier, 2023)The Sanjiang Plain (SJP), located at the confluence reaches of the Heilong, Songhua, and Wusuli Rivers in Northeast China. his study aimed to quantify the effects of varying climate and land-use/land-cover (LULC) dynamics ... -
Sustainable groundwater use, the capture principle, and adaptive management
Seward, Paul; Xu, Yongxin; Brendonck, Luc (Water Research Commission, 2006)The purpose of this paper is to review the case for using ‘capture’ rather than recharge as the conceptual basis for sustainable groundwater use in South Africa. Capture refers to the sum of the increase in recharge and ... -
A tensor approach to the estimation of hydraulic conductivities in Table Mountain Group aquifers of South Africa
Lin, Lixiang; Xu, Yongxin (Water Research Commission, 2006)Based on the field measurements of the physical properties of fractured rocks, the anisotropic properties of hydraulic conductivity (HC) of the fractured rock aquifer can be assessed and presented using a tensor approach ... -
A three-tier approach to protect groundwater resources in South Africa
Xu, Yongxin; Reynders, A.G. (Water Research Commission, 1995)The quality of groundwater is affected by many activities occurring on the surface of the earth. A pro-active protection approach is required to avoid the costly and technology difficult exercise of groundwater remediation. ... -
Transformation between phreatic water and soil water during freeze–thaw periods
Chen, Junfeng; Gao, Xuguang; Zheng, Xiuqing; Miao, Chunyan; Liu, Ping; Du, Qi; Xu, Yongxin (MDPI, 2018)During freeze–thaw periods, the exchange between shallow groundwater and soil water is unusually strong and bidirectional, which causes soil salinization and affects the accuracy of water resources assessment. The ... -
A water balance approach to the sustainable management of groundwater in South Africa
Wright, K.A.; Xu, Yongxin (Water Research Commission, 2000)The water balance approach, based on the principles of conservation of mass, is applied to the issue of sustainable groundwater management in South Africa, incorporating the ethos of the National Water Act of 1998, ...