Improving Urban Runoff Drainage Systems In Shire Indaselassie Town
| dc.contributor.advisor | Daniel, Fikerselassie (PhD) | |
| dc.contributor.author | Mearg, Belachew | |
| dc.date.accessioned | 2019-12-09T10:59:45Z | |
| dc.date.accessioned | 2023-11-11T08:32:23Z | |
| dc.date.available | 2019-12-09T10:59:45Z | |
| dc.date.available | 2023-11-11T08:32:23Z | |
| dc.date.issued | 2019-03 | |
| dc.description.abstract | Storm water discharges are produced when the capacity of the land to retain precipitation is exceeded and run-off occurs. Run-off will be influenced by rainfall and intensity and duration, antecedent storms and a number of watersheds, and land use characteristics such as slope, soil type, and impervious surfaces. In Shire Enda Selassie city rainfall induced flooding during rainy season is a regular phenomenon. This may be due to either small size of the drainage canal, an incremental of rainfall, improper design of self-cleansing velocity or increasing of impervious surfaces of the catchment. Identifying the main problem associated with the drainage system feasibility and making the system sustainable is important. To Simulate the flooding problem in the city using SWMM model which shows the over loaded conduits as well as junctions then select the preferable depth of flow in conduit or junction without overflow. Delineation of the area creates by depending on site visiting bounds the region by flow contributes to the junction or drainage. For one control point the total area contributes flow is delineated .The total catchment area modeled by SWMM is 56.8 ha, which have 131 junctions, 130 conduits (links) and two out fall considers. For this catchment the total runoff computed using model is 9.28m3/s whereas calculated by rational method is 7.4m 3 /s. The network link simulation a result implies around 22.9 % of links is over pressured due to flood. The total simulation accuracy of the runoff and network systems as assessed by statistical methods, were RNS, =0.62 and R2 = 0.97. The proposed mitigation measures are modifying the depth of links for those links. Another case the model cannot simulate the flood problem exists due to partially blocked the links, so for this problem continuous maintenance is mandatory. Therefore, the effectiveness of different sustainable drainage systems; Trench filter, swale and green roof and enlargement of pipe diameters were evaluated for this case study. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/20332 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Ethiopia | en_US |
| dc.subject | Shire Endaslasse | en_US |
| dc.subject | SWMM model | en_US |
| dc.subject | Sustainable drainage system | en_US |
| dc.subject | Mitigation measures | en_US |
| dc.title | Improving Urban Runoff Drainage Systems In Shire Indaselassie Town | en_US |
| dc.type | Thesis | en_US |