دراسة بعض الخصائص الهيدرولوجية لنهر الدجيلة في محافظة واسط

Abstract

Abstract The study tackled some hydrological features of AL-Dujailah river, it was illustrated through statistical analysis that the average of drainage was (13,8)m3/s. for the period between(2000-2012) of AL-Dujailah river dam station and (197,9)m3/s. for AL-Kut Dam station on the Tigris river to the same period. So, it is clarified that the connection of drainage system and the quality of AL-Dujailah river water with the hydrological features of Tigris river at AL-KUT Dam. This is system under the control of annual, seasonally and monthly variety for those averages. In addition to the impact of human fix factor, this variety resulted a decrease in the annual return to fulfill the water needs for various uses in different sides of the study area. It was shown that the share of each square kilometer from that drainage in the study area was (17,9) L./S./Km2 to the main organizer of AL-Dujailah dam station, and the medium height of water for AL- Dujailah area was (5,594)millimeter/year and there was a direct relationship between the sample of drainage (L./S./Km2), and the medium height of water in the area (millimeter/year) and the opposite relationship between the size of area (km2 ) and the medium of water height in it. It was also shown through studying some chemical features of AL-Dujailah river in seven selected locations at the long of the river starting from AL-Kut Dam when the AL-Dujailah river is resulted from Tigris river and up to its end south of AL-Kut city, the values of elements that measured were high, and this resulted from the decrease of drainage and it leads to the increase of melted materials, while the increase of the drainage of water leads to the opposite because when the drainage of water is rising, the focus of melted materials does not have enough time to be in touch with the banks of river and the melting become little because of the reduce. In addition to the increase of pollutants represented by the healthy drainage system and drains found along the old running of AL-Dujailah river.