ESTIMATION SYNTHETIC UNIT HYDROGRAPHS PARAMETERS FOR WADI AL-BATHAN SUB-CATCHMENT
| dc.contributor.author | Ghossoun Zeyad Tawfiq Hamedallah | |
| dc.date.accessioned | 2024-05-26T09:31:23Z | |
| dc.date.available | 2024-05-26T09:31:23Z | |
| dc.date.issued | 2023-03-29 | |
| dc.description.abstract | Abstract Developing unit hydrographs is critical for hydraulic structure design and water resource management in gauged catchments. Due to the lack of local data, engineers should strive to estimate discharges based on empirical (synthetic) methods that can predict runoff based on rainfall in the ungauged catchments. Synthetic unit hydrographs, such as the Snyder and Soil Conservation Service (SCS), are popular and play an essential role in hydrology. These methods are simple, requiring only catchment characteristics such as area, length of mainstream, and slope. Therefore, these methods serve as valuable tools to simulate runoff from the ungauged catchment to estimate peak discharge, time to peak, and runoff volume. This research study is Al-Bathan sub-catchment, which is located in the northeastern part of the West Bank in Palestine with an area of 83 km2. The study used a de-convolution matrix approach to develop an average one-hour unit hydrograph by selecting four significant rainfall events in the period (2005-2007), and the direct runoff hydrographs which are measured by Al-Bathan flume located in the outlet of the sub-catchment. By computing the characteristics of the average one-hour unit hydrograph with peak discharge is 4.52 m3/sec and time to peak is 5 hours, Snyder and SCS hydrographs were developed to suit Al-Bathan sub-catchment physical characteristics. The parameters were determined for the Snyder, where Cp = 0.88 and Ct = 1.26, and the SCS, where Cp = 1.90 and C = 2.92. Therefore, these parameters fit the study area. These synthetic one-hour unit hydrographs were examined during two events (2017–2019) by comparing observed and simulated direct runoff hydrographs for these events. The performance was tested statistically using the Nash-Sutcliff coefficient, coefficient of determination, volume error, and percentage bias. Results showed that the synthetic unit hydrographs are suitable for application and that the SCS method is more accurate. Keywords: Al-Bathan Sub-catchment; Direct Runoff Hydrograph; Palestine; Synthetic Unit Hydrograph; Unit Hydrograph; Ungauged Catchment. | |
| dc.identifier.uri | https://hdl.handle.net/20.500.11888/18875 | |
| dc.language.iso | en | |
| dc.supervisor | Dr. Sameer Shadeed | |
| dc.title | ESTIMATION SYNTHETIC UNIT HYDROGRAPHS PARAMETERS FOR WADI AL-BATHAN SUB-CATCHMENT | |
| dc.type | Thesis |