Writers : Lashkaripour, Gholam Reza; Ghafoori, Mohammad; Kazemigolian' Ramezan; Damshenas, Mahdi
Refference : The 26th Symposium on Geoscieences;Tehran
Publishing Year : 1386

Abstract :
Neyshabur plain is one the most important plain razavi Khorasan province. In the last decades, overexploitation on groundwater resource has caused increased pressure on the plain aquifer. As a result of groundwater decline, land subsidence, quality changing and decreasing in well discharge reported in some parts of the plain. The effect of land subsidence can be seen as cracks and earth fissures on surface. Land subsidence and cracks have caused problems for farm land, road and other structures which are close to these cracks. This paper deals with the main reason of this phenomenon and its effects on the plain. Also, three man wells were digged to find information about the soil types which are close to these cracks. Moreover, for measuring of the land subsidence in the plain, data of a GPS station that is located in Neyshabur climatology station were used. The results of this research has shown that land subsidence can bee seen in those parts of the plain as a result of the severe depletion of the aquifer and where the soil type of aquifer is from CL and ML based on the Unified Soil Classification System.
Subject List : Drawdown of ground water level