Modeling climate change impact on hydrology and sediment yield in the Swat Basin in Pakistan | |
| Author | Sattar, Hira |
| Call Number | AIT Thesis no.WM-17-08 |
| Subject(s) | Hydrology--Pakistan--Swat Basin Climatic change--Pakistan--Swat Basin |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Water Engineering and Management |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. WM-17-07 |
| Abstract | Soil erosion and sedimentation in surface waters can adversely affect the water availability in the water bodies and efficiency of the hydraulic structures. Changes in the climate have a direct impact on the hydrology and sediment generated in a basin, and there is a need to assess the relation between these. This research delve s into the study and analysis of the relationship between alterations in climate and its effect on streamflow and sediment yield, and to devise suitable measures to adapt to that change. In this research, future climate data was obtained from three regional climate models (namely, REMO, CNRM and MPI), RCP 4 .5 and 8.5 scenarios were used , and linear scaling was done to correct the biases . Further analysis and modeling through SWAT was done for establishment of relationships between climate, discharge and sediment yield. Results of analysis depict an increase in temperature in the future, causing early snowmelt and shifting peak discharge from summer to spring. An overall increase of 1.3 to 2.2 O C is projected to increase in 2011 - 2099 under RCP 4.5 and 2.3 to 3.75 o C under RCP 8.5. Future precipitation is likely to change from 16% to 23% under RCP 4.5 and - 20% to 13.8% under RCP 8.5. The overall discharge in the Swat river basin is expected to rise in future, with higher rate of increase in winters with respect to the baseline period whereas it is expected to decrease in summer and autumn. Sediment generation showed a direct relation with the variations in discharge, showing an overall increase in the future. Sediment generation is especially high in the months of March to May due to increase in temperature and precipitation in these months. Options for the reduction of erosion and consequent sediment origination control were simulated and compared . which lead to the primary outcome of this research , that the provision of sediment basin for management of sediment yield in the Swat river basin can reduce sediment yield by 65% in the Swat basin |
| Year | 2017 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. WM-17-08 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Water Engineering and Management (WM) |
| Chairperson(s) | Shrestha, Sangam |
| Examination Committee(s) | Babel, Mukand Singh;Shrestha, Rajendra Prasad;Sarawut Ninsawat |
| Scholarship Donor(s) | AIT Fellowship |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2017 |