Evaluation the impact of natural and human factors on the underground water level of Darab County

The impact of natural and human factors that affect the level of Darab Plain was evaluated to determine the role of each of these factors in decreasing the level of groundwater occurrence. In recent decades, Simultaneity climate change and increasing population, industry and agriculture cause’s ambiguity in cognition of more effective factors in decreasing underground water reserves in the country. Darab plain in the south-eastern of Fars province has an important role in the field of agriculture and horticulture in the country. However, many natural factors affect, but from the natural, precipitation and evaporation were studied as the most important factors affecting the level of underground waters. From the human factors also seem to indiscriminate exploitation and numerous drilling deep and semi-deep wells have a significant impact on underground water resources. To assessment, the trend of data was used Mann- Kendall test and was applied Sen’s slope estimator to calculate data slope. Pearson correlation coefficient was applied to evaluate the relationship between groundwater level data with the data of precipitation and the exploitation of them. By comparing the natural parameters trend and the exploitation of water resources in the region, it can be concluded that natural factors have been little effective in decreasing the level of underground water and human activities played a significant role.