Simulation of Land Use Impacts on Sediment and Nutrient Transfer in Coastal Areas of Western Cape, South Africa

• Autorzy: Micha Gebel , Stephan Bürger , Michael Wallace , Hanlie Malherbe , Hannah Vogt , Carsten Lorz
• Języki publikacji: EN

Abstrakty

EN

A major challenge for water resource management in Western Cape, South Africa, is the reduction of the growing sediment and nutrient loads in coastal areas, which belong to the areas most affected by land use change. We used the WebGIS based software STOFFBILANZ to simulate runoff, soil loss, sediment, phosphorus, and nitrogen input in the surface water and groundwater of study area (ca. 6,450 km²). The simulated runoff shows a large regional variability caused by the heterogeneous distribution of rainfall. For the reference catchment Klein River simulated total daily runoff fit the observed values of the reference year 2012. The calculation of potential input of sediment, phosphorus, and nitrogen into waters is based on aggregated or generalized information on climate data, land use types, crop and fruit types, yields, mineral fertilizers, farm manure, nitrogen fixing by leguminous plants, atmospheric nitrogen deposition, and soil denitrification. Critical source areas for potential sediment input, particulate P input and diffuse N input are mainly agricultural areas. Additionally, point sources of high relevance for N and P are found in urban areas. Based on the potential input of sediment and nutrients the impacts of current land use change on water resources were estimated. We used the web-based information system WebLand for the simulation aiming at the provision of stakeholders with information for decision making in water resource management. (original abstract)

Słowa kluczowe

EN

Land use; Spatial development

PL

Użytkowanie ziemi; Zagospodarowanie przestrzenne

• Czasopismo: Change and Adaptation in Socio-Ecological Systems
• Rocznik: 2017
• Tom: 3
• Numer: nr 1
• Strony: 1--17

Twórcy

autor

Micha Gebel

• Anhalt University of Applied Sciences; Gesellschaft für Angewandte Landschaftsforschung (GALF)

autor

Stephan Bürger

• Gesellschaft für Angewandte Landschaftsforschung (GALF)

autor

Michael Wallace

• Western Cape Department of Agriculture, South Africa

autor

Hanlie Malherbe

• Anhalt University of Applied Sciences

autor

Hannah Vogt

• Technical University of Munich, Germany

autor

Carsten Lorz

• Anhalt University of Applied Sciences

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Identyfikatory

DOI

https://doi.org/10.1515/cass-2017-0001