Topographical and Hydrological Investigations for the Design of a Drainage Network the Fields of the College of Agriculture are a Model

Abstract

In order In order to study the changes that occur in groundwater, the degree of its salinity, the percentage of sodium adsorption, and the total amount of dissolved salts in the samples taken from 35 wells within the study area before starting the drainage operations procedures and comparing them with what happens after the drainage operations begin. An area of 300,000 square meters was selected within the southern fields of the College of Agriculture In the University of Anbar, which is already suffering from the problem of the rise in the ground water level due to the presence of a water source that is considered as a source of nourishment for the ground water within the fields of the college. The results showed that there was a discrepancy in the depths of the groundwater, as the groundwater level decreased to 120 cm after the start of the drainage works, while its level was 87 cm before the drainage as an average for the months of the test selected. The degree of salinity of the ground water followed the same behavior, as a decrease was observed in the degree of salinity of the ground water for the studied samples after conducting the drainage operations compared to its values before the drainage operations, as it reached its lowest value (3.8, 3.12) dS / m after starting the drainage operations, while its values were (5.8, 5.87) dS/m before drainage operations and for the summer and winter seasons, respectively.