Abstract
On account of the near universal availability, dependability and low capital cost; ground water is the most preferred source of water in various sectors in India. Increasing demand of ground water followed by indiscriminate extraction in various parts of the country, indifferent to the recharging capacities of aquifers and other environmental factors are creating pressure on this water resource. In recent years, National Capital Territory (NCT) of Delhi is experiencing ground water crisis due to rapid urbanization, population growth, increasing demand in industrial sectors and farm houses. Ground water undergoes further stress when it is extracted during drought periods or unplanned withdrawal from subsoil aquifer. Depending upon the availability of continuous set of data, a spatio-temporal analysis of dynamic ground water levels of four selected districts of NCT Delhi - New Delhi, South-West Delhi, South Delhi and North Delhi have been attempted on the basis of the methodology namely Ground Water Hydrographs (1990-91 to 2011-12) both for the pre monsoon and post monsoon time period. Based on the overall assessment of dynamic ground water resources, a broad ground water management plan has been proposed. KEYWORDS: Ground water, urbanization, population growth, subsoil aquifer, wround water hydrographs
Highlights
Both of the demand and the supply can be assumed to increase followed by intensification of already existed deficit in water supply. Such water deficit of National Capital Territory (NCT) Delhi can be partially augmented through the over exploitation of groundwater resources
This paper intends to focus on the following questions: 1. What are the trends of ground water level fluctuations with respect to rainfall in the four selected districts of NCT Delhi from 1990-91 to 2011-12 ?
Among the nine districts of NCT Delhi, four districts- New Delhi, South-West Delhi, South Delhi and North Delhi have been selected for this study (Figure: 1), depending upon the availability of continuous data both in terms of rainfall and ground water level for the time period of 1990-91 to 2011-12
Summary
National Capital Territory of Delhi (latitude: 76°60’E to 77°30’E; longitude: 28°0’N to 28°60’N) occupies an area of 1486km with a population density of 11297 persons/sq.km. Total water requirement for the year 2010 was 1000 million gallons per day (MGD) and the Delhi Jal Board supplied around 850 MGD including around 100 MGD from groundwater (Shekhar et al, 2009). In future, both of the demand and the supply can be assumed to increase followed by intensification of already existed deficit in water supply. Both of the demand and the supply can be assumed to increase followed by intensification of already existed deficit in water supply Such water deficit of NCT Delhi can be partially augmented through the over exploitation of groundwater resources. This paper intends to focus on the following questions: 1. What are the trends of ground water level fluctuations with respect to rainfall in the four selected districts of NCT Delhi from 1990-91 to 2011-12 ?
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