Evaluation of the impact of land use changes on groundwater resources using satellite imagery (Case study: Chaharmahal Bakhtiari)

Water in the most important component for natural resources improvement and human’s sub stain. Regardless of the value of water industry, agriculture as one of the essential factors in industry, agriculture and recreation it’s needed for beautification needs. However people can’t live without water but it can be a danger for health peace and welfare. Therefore the accurate research in aspects of it a very necessary and effective management of water resources must be one of the most important activities of the society. In many parts of Iran, including fields of research, user significant changes as related to water sources cause imbalances over some period of time. and then cause disruption and ecological destruction. With effective watershed management we can help to maintain stability. This study tries to determine the effect of land use on water resources plains of Chaharmahal Bakhtiari. Using the TM image in Apr of 2012 was to map land use. The image pre-processing was performed Resolution with six way of subtraction including, image, principal component analysis, normalized difference vegetation index, the components of conventional analysis, The difference between the brightness and contrast after classification and using topographical map 1: 25000 points from the field studies were reviewed. and by using information of water resources data’s for May of 2012, the initial and additional studies and other data’s map land use in the region were made. Results show that except Farsan-Joneghan and Gandoman-Boldaji plains, other plains will have groundwater negative budject.with continuing the current state; the aquifers are going to be in critical situation, in the near future. also results of this paper show that to equivalent ground water of Shahrekord, Borougen, Sefidasht, Kiyar, Farad and Khanmirza, it would be necessary to reduce utilization of groundwater resources of these plains up to %48, %32, %66, %30, %13 and %12 ,respectively. But the results of the model for Farsan, Shalamzar and Gandoman aquifers show that we can increase in groundwater utilization level as %23, %45, and % 56 respectively.
The main reason for the change of land use from grasslands to agriculture, was reduced the groundwater reserves.
The results can be accurate to the land, especially land and water resources planning based on demographic and economic characteristics of each country shall be used.