GIS-Based Rain Water Harvest Considering Population as a Function

Abstract

AbstractPure water is the world’s first and foremost medicine. So, if crisis happens, our society will be destroyed because a drop of water is more important than a sack of gold for a thirsty man. Not only drinking, but, water is also used day-to-day life in household as well as outdoor field work and various domestic works. In West Bengal, water is very essential in agricultural field. Here, ground water is limited, and now, the water level is gradually decreasing with the increasing of the population. Ground water is the one and only source of our drinking water. For preserving our ground water for the near future, the best alternative way is to utilize our monsoon season and store rain water as much as we can. If rain water is harvested properly, then it can be used in agricultural field as well as many household works so that usage of ground water decreases. There is a large variation in the amount of rainfall in the different parts of West Bengal annually. This is where the concept of rainwater harvesting comes into effect. In this paper, we describe the actual rain fall scenario in monsoon season (including pre- and post-monsoon) of West Bengal with compare to population which shows the requirement of water district wise. From this concept, we will be able to understand how much rain water harvesting is required and why it is so important? Using remote sensing and QGIS technique, we analyze district-wise rainfall data of West Bengal for a particular period of time (2002–2010). We also observed the population scenario of every district for the same period of time. For both the cases, we prepare a thematic maps. Efforts are given to make observation from the thematic that how much this process is beneficial for the society.KeywordsRemote sensingQGISRainwaterMonsoon seasonPopulation