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Watershed ecosystem modeling of land-use impacts on water quality

Author

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  • Erol, Ayten
  • Randhir, Timothy O.

Abstract

Sustaining freshwater systems in the face of rapid changes in land use continue to be a major challenge in lake watersheds. Lake Egirdir is a major freshwater lake in Turkey and is significant in supporting several ecosystem services of the region. The nutrient loading from both point and nonpoint sources has reduced the quality of the tributaries and the lake ecosystem. There is a need for comprehensive modeling of strategies to protect the lake and watershed ecosystems. This study uses a watershed systems modeling to assess hydrologic flows and nutrient loads in order to quantify effectiveness of management practices in reducing runoff and nonpoint source pollution. The study uses GIS to process spatial data and simulation modeling to assess hydrologic and contaminant processes at a watershed scale. Management strategies are evaluated by quantifying the effect of targeted best management practices (BMPs) in urban, forest and agricultural land uses. The results show that urban and forest loss can affect the watershed and lake ecosystems. There is a need for spatially targeted policies to sustain the lake watershed. Land use management through education and incentives through conservation practices can be used to reduce nutrient and sediment loads in sensitive areas of the watershed.

Suggested Citation

  • Erol, Ayten & Randhir, Timothy O., 2013. "Watershed ecosystem modeling of land-use impacts on water quality," Ecological Modelling, Elsevier, vol. 270(C), pages 54-63.
    • Handle: RePEc:eee:ecomod:v:270:y:2013:i:c:p:54-63
    DOI: 10.1016/j.ecolmodel.2013.09.005
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    Cited by:

    1. Chen Lin & Ronghua Ma & Bin He, 2015. "Identifying Watershed Regions Sensitive to Soil Erosion and Contributing to Lake Eutrophication—A Case Study in the Taihu Lake Basin (China)," IJERPH, MDPI, vol. 13(1), pages 1-14, December.
    2. Yao, Jing & He, Xingyuan & Chen, Wei & Ye, Yin & Guo, Ruichao & Yu, Lizhong, 2016. "A local-scale spatial analysis of ecosystem services and ecosystem service bundles in the upper Hun River catchment, China," Ecosystem Services, Elsevier, vol. 22(PA), pages 104-110.
    3. You, L. & Li, Y.P. & Huang, G.H. & Zhang, J.L., 2014. "Modeling regional ecosystem development under uncertainty – A case study for New Binhai District of Tianjin," Ecological Modelling, Elsevier, vol. 288(C), pages 127-142.
    4. Chen Lin & Ronghua Ma & Zhihu Su & Qing Zhu, 2015. "Detection of Critical LUCC Indices and Sensitive Watershed Regions Related to Lake Algal Blooms: A Case Study of Taihu Lake," IJERPH, MDPI, vol. 12(2), pages 1-20, January.

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