An Analysis of The Subsidence Factors in The Ardabel Plain and Influence of Them in Urban Range

The Ardabil city area has more than 2398 km2 with 504946 residuals. The procedure of increasing of people and ratio of urban land use according to the drought (especially 1371 to 1387), immigration of rural people to the Ardabil and so becoming Ardabil as a province center in 1372 are intensified. Water consumes per capita in the developing and semi arid zone estimated between 150 to 200 liter. Water consume per capita in the Ardabil city in per day 10098920 liter/day and annually of them about 398610580 liter(368610/58 m3) are estimated. In addition water necessary of Ardabil plain in the Agriculture, industrial section’s 588000000 m are estimated. The total water potential (grand and surface waters or runoffs) is estimated about 256000000 m3. To day the water deficient of plain is 347000000 m3 is the more important factors in the subsidence of Ardabil plain. Extensive extraction of water, Climatic change, ratio of people increasing, industrial developing and tectonic variation respectively have vital roll in the subsidence of the Ardabil plain.