التغيرات الهيدرولوجية لنهر دجلة في العراق == Hydrological changes of the Tigris River in Iraq
Author name:
طالب طارش طاهر ال مسافر
Supervisor name:
حمدان باجي نوماس
General topic:
Geography
Specific topic:
Natural Geography
Degree:
Doctorate
University:
University Of Basrah - College Of Education For Human Sciences - Department Of Geography
Language:
Arabic
University location:
Basrah
First pages:
10T1763 - p.pdf
Abstract:
Iraq greatly depends on the surface water resources, most of those resources come from Tigris and Euphrates and their branches. Three countries benefit from these two rivers, (Turkey, Syria, and Iraq), each of which has their own investment plans for the rivers, which have put Iraq in front of different challenges that concerns its aquatic security. Therefore, this study targeted the hydrologic changes of the Tigris basin. It was observed that a combination of natural and human factors have affected the hydrologic changes of the basin, and this change have become more vivid in the branches that feed the river to the river estuary.These factors can be summarized as follows : 1 - Climate Change and Global Warming which have led to the aridity, leading to a great decrease in rain and snow ratios, and a vivid decrease in the aquatic income of the Tigris. The decreased amount of rain and snow have affected the length of both flood and dryness periods according to the excessive nourishment or its scarcity. The contrast is most obvious in the dry years or in the wet ones or those close to the average, the flood period is longer in the wet years, whereas the dry periods are longer in the dry years, and their aquatic income increases or decreases according to the dry period which is shorter in the wet years and longer in the dry ones.2 - The vivid change of the hydrological characteristics of quality for the Tigris waters. When comparing the lab results of the year of study (2017) with those of the years (1970 - 2011), we find that the water quality has changed. The PH level increased, the Ec level also increased, and however the water is rich with the Ca levels, it is still consumable. The Magnesium levels were (66.05) and this is within the allowed limits. The Cl level is also increasing, but the SO4 was (35.5) mlg/ltr, which also within the internationally allowed limits. The Na reached (251.4) mlg/ltr, which is increasing when compared with the readings of the previous years. The (T.D.S) was 700.5 mlg/ltr, which also indicates and increase. However, it was then clear that the salt concentration has changed as you go down the river to the south. This is due to the lack of drainage, as well as what the site indicators reflect such as the reverting streams. It was noted that most of the salty concentrations incline in the dryness period and increased from the north of Saleh’s Castle to Al - Gerneh.3 - The lower - than - normal aquatic income of the Tigris compared to the previous years, which is expected to reach (9,16) billion cubic meter once Al - Kab project is complete. This is considered a huge deficit as the amount of needs is over 60 billion cubic meters, apart from those needs that are required to maintain the Marshes according to the needed rates which also an additional 16 billion cubic meters.4 - The operational plans of Turkey and Iran that control the amount of water reaching Iraq. There are a number of dams established on the Tigris. Therefore, Iraq, geographically speaking, is in a rather negatively affected position being the country of the estuary. Iraq can be negatively affected by the procedures of the neighboring countries that are on the Tigris, and is also negatively affected by the quality of the aquatic income feeding the river.5 - The nature of water planning administration inside Iraq. Most of the projects need further maintenance and development, as well as the aquatic weed, the pollution factors, acts of misuse in the agricultural, domestic, and industrial needs.The perfect usage of the conventional and unconventional water resources does not exist. Therefore, the study have come to a number of recommendations : 1 - The urgent move towards the neighboring countries (Iraq, Syria, and Turkey) that aims at finding the mutual mechanism for redistributing the water shares in the way that serves the interests of all parties according to the international law.2 - Improving the old irrigation systems into the modern ones, such as the spraying and drip irrigation, as well as the developed surface irrigation.3 - Maintaining the water resources from the pollution resulting from the human, agricultural, and industrial activities that are drained into the drainage without being processed, through issuing the laws, legislations as well as the severe consequences against violators.4 - Maintaining the waters by keeping them from being spoiled due to the old irrigation methods that result from the increase vaporization and leakage from the outer irrigation pipes, and using the underground pipes instead.5 - Maintaining the dams and the water reservoirs, putting them back into work according to a centrally controlled plan in order to secure the water needs, especially the irrigative needs, as well as generating electrical power.6 - Developing water administration through the integrated administration of aquatic resources in order to solve the problems that face the water resources such as the low feeding resources, wasted water, as well as pollution, and the lower usage of the conventional and unconventional water resources
