Effect of Acid Precipitations on Formed Soils Infiltration in Gachsaran formation

Subject Areas : Water and Environment

hamzah  saeediyan ¹ (Assistant Professor, Department of Soil Conservation and Watershed Management Research, Kerman Agricultural and Natural Resource Research Center, Agricultural Research, Education and Extension Organization, Kerman, Iran.)

Received: 2022-09-18 Accepted : 2023-10-06 Published : 2023-05-22

Keywords: Key words: Rainfall simulator, Acidic rain, Gachsaran formation, Infiltartion,

Abstract :

Each soil mass is composed of solid grains with different sizes and empty spaces that allow empty spaces to be moved to water from a high-energy point to a lower-energy point, which creates the permeability of the soil. In this study, in order to determine the most important factors affecting soil permeability, compared to acidic rainfall in the slope main aspects of Gachsaran formation, a part of the gypsum mountain basin of Izeh City with an area of 1202 hectares was selected. This study, In order to determine the relationship between the infiltration rate by rainfall simulator with some soil physical and chemical properties such as percentage of gravel, clay, silt, sand, acidity, electrical conductivity, moisture, calcium carbonate, and organic matter and sodium were performed in different slopes of Gachsaran formation. The most important factors influencing the penetration rate were identified by multivariate regression. The regression models showed that generally, in all slope main aspects in Gachsaran formation in rainfall with distilled water, the chemical characteristics of the most important role in increasing and decreasing the permeability and in precipitation with the acidity 5, the chemical characteristics of the soil are the most important role in increasing and decreasing the level of permeability, but with increasing the concentration of acidity to 4, the physical and chemical characteristics of the soil have an equal role in increasing and decreasing.