Optimal Land-Use Management for Surface Source Water Protection Under Uncertainty: A Case Study of Songhuaba Watershed (Southwestern China)

The water supply to Chinese cities is increasingly degrading from pollution due to watershed activities. Consequently, water source protection requires urgent action using optimal land-use management efforts. An inexact linear programming model for optimal land-use management of surface water source area was developed. The model was proposed to balance the economic benefits of land-use development and water source protection. The maximum net economic benefit (NEB) was chosen as the objective of land-use management. The total environmental capacity (TEC) of rivers and the minimum water supply (MWS) were considered key constraints. Other constraints included forest coverage, government requirements concerning the proportions of various land-use types, soil loss, slope lands, and technical constraints. A case study was conducted for the Songhuaba Watershed, a reservoir supplying water to Kunming City, the third largest city in southwestern China. A 15-year (2006 to 2020) optimal model for land-use management was developed to better protect this water source and to gain maximum benefits from development. Ten constraints were involved in the optimal model, and results indicated that NEB ranged between 893 and 1,459 million US$. The proposed model will allow local authorities to better understand and address complex land-use systems and to develop optimal land-use management strategies for balancing source water protection and local economic development.

[1]  G. H. Huang,et al.  A hybrid inexact-stochastic water management model , 1998, Eur. J. Oper. Res..

[2]  Ni-Bin Chang,et al.  A grey fuzzy multiobjective programming approach for the optimal planning of a reservoir watershed. Part B: Application , 1996 .

[3]  Feng Zhou,et al.  ICCLP: An Inexact Chance-Constrained Linear Programming Model for Land-Use Management of Lake Areas in Urban Fringes , 2007, Environmental management.

[4]  Erwin H. Bulte,et al.  Uncertainty and forest land use allocation in British Columbia: vague priorities and imprecise coefficients. , 1997 .

[5]  G. Heuvelink,et al.  Using Linear Integer Programming for Multi-Site Land-Use Allocation , 2003 .

[6]  E. Giménez,et al.  Optimal Allocation of Land between Productive Use and Recreational Use , 2003 .

[7]  Sheng Yu,et al.  Land allocation based on integrated GIS-optimization modeling at a watershed level , 2004 .

[8]  Valentina Bosetti,et al.  Uncertainty and Option Value in Land Allocation Problems , 2003, Ann. Oper. Res..

[9]  A. Batabyal An optimal stopping approach to land development under uncertainty , 2000 .

[10]  Ni-Bin Chang,et al.  Stability analysis of grey compromise programming and its application to watershed land-use planning , 1999, Int. J. Syst. Sci..

[11]  Guohe Huang,et al.  AN INEXACT TWO-STAGE STOCHASTIC PROGRAMMING MODEL FOR WATER RESOURCES MANAGEMENT UNDER UNCERTAINTY , 2000 .

[12]  Huaicheng Guo,et al.  Water quality modeling for load reduction under uncertainty: a Bayesian approach. , 2008, Water research.

[13]  Ni-Bin Chang,et al.  Optimal Management of Environmental and Land Resources in a Reservoir Watershed by Multiobjective Programming , 1995 .

[14]  S. D. Gorantiwar,et al.  Multilevel Approach for Optimizing Land and Water Resources and Irrigation Deliveries for Tertiary Units in Large Irrigation Schemes. I: Method , 2005 .

[15]  Guohe Huang,et al.  A dynamic optimization approach for nonrenewable energy resources management under uncertainty , 2000 .

[16]  Animesh Biswas,et al.  Application of fuzzy goal programming technique to land use planning in agricultural system , 2005 .

[17]  Yong Liu,et al.  An Interval Fuzzy Multiobjective Watershed Management Model for the Lake Qionghai Watershed, China , 2006 .

[18]  Derek Karssenberg,et al.  Building dynamic spatial environmental models , 2002 .

[19]  G. Mendoza A mathematical model for generating land-use allocation alternatives for agroforestry systems , 1987, Agroforestry Systems.

[20]  Huda Abdelwahab Sharawi,et al.  Optimal land-use allocation in central Sudan , 2006 .