Spatial Optimisation Technique for Planning Groundwater Supply Schemes in a Rapid Growing Urban Environment

• Published in: Water resources management 2014-02, Vol.28 (3), p.731-747
• Main Author: Korada, Durga Rao H. V
• Format: Article
• Language: English
• Subjects: Applied geophysics; Atmospheric Sciences; cities; Civil Engineering; Climate change; Decision making; Decision support systems; Demand; Developing countries; Domestic; Domestic water; Earth and Environmental Science; Earth Sciences; Earth, ocean, space; Environment; Exact sciences and technology; Geographic information systems; Geotechnical Engineering & Applied Earth Sciences; Groundwater; Hydrogeology; Hydrology. Hydrogeology; Hydrology/Water Resources; Internal geophysics; LDCs; Linear programming; Mathematical models; Mathematical programming; new methods; Objectives; Optimization; Planning; Pumping; Satellite navigation systems; space and time; spatial data; Stream flow; Studies; Urban areas; Urban environments; Water conservation; Water demand; water requirement; Water requirements; Water resources; Water resources management; Water shortages; Water supply; Water table
• ISSN: 0920-4741; 1573-1650
• DOI: 10.1007/s11269-013-0511-0

Uneven distribution of domestic water in space and time is a major concern in many fast growing cities due to improper planning and lack of scientific approach. This problem is much severe where the maximum domestic water requirements are met from the groundwater resources. Optimising a single groundwater pumping scheme may be an easy task using simple linear programming technique but, if the number of pumping schemes and constraints are more, solutions for identifying such groundwater schemes are more difficult and laborious using conventional methods as the constraints varies in space and time. In this paper, a new technique was developed to identify new groundwater pumping schemes to meet the present and future domestic water requirements in space and time by integrating spatial optimisation technique with the groundwater model. The approach considers the possible optimum rate of groundwater pumping, minimising the cost of water supply scheme and having minimum impact on the downstream side groundwater table using high resolution satellite data (IKONOS), Geographical Information System (GIS) tools and optimisation techniques. Dehradun, which is one of the fast growing cities in India, was considered as a study area to demonstrate the proposed new technique. Domestic water demand for next two decades (up to 2,031) was forecasted and compared with the existing supplies. Nearly 48 additional groundwater pumping schemes were identified to cater the present and future demands. Its impact on the groundwater table was also studied using groundwater modelling technique.