Assessment and Mitigation of Streamflow and Sediment Yield under Climate Change Conditions in Diyala River Basin, Iraq
| Autor: | Rana D. Al-Chalabi, Mahmoud Saleh Al-Khafaji |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Hydrology
geography geography.geographical_feature_category Watershed Soil and Water Assessment Tool Drainage basin Diyala River Climate change Sediment Oceanography climate change Streamflow Environmental science lcsh:Q Climate model SWAT model lcsh:Science Waste Management and Disposal Earth-Surface Processes Water Science and Technology |
| Zdroj: | Hydrology Volume 6 Issue 3 Hydrology, Vol 6, Iss 3, p 63 (2019) |
| ISSN: | 2306-5338 |
| DOI: | 10.3390/hydrology6030063 |
| Popis: | The impact of climate change on the streamflow and sediment yield in the Derbendkhan and Hemrin Watersheds is an important challenge facing the water resources of the Diyala River in Iraq. The Soil and Water Assessment Tool (SWAT) was used to project this impact on streamflow and sediment yield until year 2050 by applying five climate models for scenario A1B involving medium emissions. The models were calibrated and validated based on daily observed streamflow and sediment recorded for the periods from 1984 to 2013 and 1984 to 1985, respectively. The Nash&ndash Sutcliffe efficiency and coefficient of determination values for the calibration (validation) were 0.61 (0.53) and 0.6 (0.62) for Derbendkhan and Hemrin, respectively. In addition, the average of the future predictions for the five climate models indicated that the streamflow (sediment yield) for the Derbendkhan and Hemrin Watersheds would decrease to 49% (43.7%) and 20% (30%), respectively, until 2050, compared with the observed flow of the base period from 1984 to 2013. The spatial analysis showed that 10.4% and 68% of the streamflow comes from Iraqi parts of the Derbendkhan and Hemrin Watersheds, respectively, while 10% and 60% of the sediment comes from the Iraqi parts of the Derbendkhan and Hemrin Watersheds, respectively. Deforestation of the northern part of the Hemrin Watershed is the best method to decrease the amount of sediment entering the Hemrin Reservoir. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|