Evaluation of Design Storms and Critical Rainfall Durations for Flood Prediction in Partially Urbanized Catchments
This study investigates and compares several design storms for flood estimation in partially urbanized catchments. Six different design storms were considered: Euler II, alternating block method, average variability method, Huff’s curves, and uniform rainfall. Additionally, two extreme historical st...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-07-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/12/7/2044 |
| _version_ | 1797562059919982592 |
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| author | Nino Krvavica Josip Rubinić |
| author_facet | Nino Krvavica Josip Rubinić |
| author_sort | Nino Krvavica |
| collection | DOAJ |
| description | This study investigates and compares several design storms for flood estimation in partially urbanized catchments. Six different design storms were considered: Euler II, alternating block method, average variability method, Huff’s curves, and uniform rainfall. Additionally, two extreme historical storms were included for comparison. A small, ungauged, partially urbanized catchment in Novigrad (Croatia) was chosen as a study area to account for the infiltration impact on the rainfall-runoff process. The performance of each design storm was assessed based on the flood modeling results, namely the water depth, water velocity, flow rate, and overall flood extent. Furthermore, several rainfall durations were considered to identify a critical scenario. The excess rainfall was computed using the Soil Conservation Service’s Curve Number method, and two-dimensional flooding simulations were performed by the HEC-RAS model. The results confirmed that the choice of the design storm and the rainfall duration has a significant impact on the flood modeling results. Overall, design storms constructed only from IDF curves overestimated flooding in comparison to historical events, whereas design storms derived from the analysis of observed temporal patterns matched or slightly underestimated the flooding results. Of the six considered design storms, the average variability method showed the closest agreement with historical storms. |
| first_indexed | 2024-03-10T18:24:12Z |
| format | Article |
| id | doaj.art-e9f3b4468ca442bda73cbef140d49087 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T18:24:12Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
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| series | Water |
| spelling | doaj.art-e9f3b4468ca442bda73cbef140d490872023-11-20T07:12:34ZengMDPI AGWater2073-44412020-07-01127204410.3390/w12072044Evaluation of Design Storms and Critical Rainfall Durations for Flood Prediction in Partially Urbanized CatchmentsNino Krvavica0Josip Rubinić1University of Rijeka, Faculty of Civil Engineering, 51000 Rijeka, CroatiaUniversity of Rijeka, Faculty of Civil Engineering, 51000 Rijeka, CroatiaThis study investigates and compares several design storms for flood estimation in partially urbanized catchments. Six different design storms were considered: Euler II, alternating block method, average variability method, Huff’s curves, and uniform rainfall. Additionally, two extreme historical storms were included for comparison. A small, ungauged, partially urbanized catchment in Novigrad (Croatia) was chosen as a study area to account for the infiltration impact on the rainfall-runoff process. The performance of each design storm was assessed based on the flood modeling results, namely the water depth, water velocity, flow rate, and overall flood extent. Furthermore, several rainfall durations were considered to identify a critical scenario. The excess rainfall was computed using the Soil Conservation Service’s Curve Number method, and two-dimensional flooding simulations were performed by the HEC-RAS model. The results confirmed that the choice of the design storm and the rainfall duration has a significant impact on the flood modeling results. Overall, design storms constructed only from IDF curves overestimated flooding in comparison to historical events, whereas design storms derived from the analysis of observed temporal patterns matched or slightly underestimated the flooding results. Of the six considered design storms, the average variability method showed the closest agreement with historical storms.https://www.mdpi.com/2073-4441/12/7/2044design stormstemporal patternrainfall durationhydraulic modelingurban floodingurbanized catchments |
| spellingShingle | Nino Krvavica Josip Rubinić Evaluation of Design Storms and Critical Rainfall Durations for Flood Prediction in Partially Urbanized Catchments Water design storms temporal pattern rainfall duration hydraulic modeling urban flooding urbanized catchments |
| title | Evaluation of Design Storms and Critical Rainfall Durations for Flood Prediction in Partially Urbanized Catchments |
| title_full | Evaluation of Design Storms and Critical Rainfall Durations for Flood Prediction in Partially Urbanized Catchments |
| title_fullStr | Evaluation of Design Storms and Critical Rainfall Durations for Flood Prediction in Partially Urbanized Catchments |
| title_full_unstemmed | Evaluation of Design Storms and Critical Rainfall Durations for Flood Prediction in Partially Urbanized Catchments |
| title_short | Evaluation of Design Storms and Critical Rainfall Durations for Flood Prediction in Partially Urbanized Catchments |
| title_sort | evaluation of design storms and critical rainfall durations for flood prediction in partially urbanized catchments |
| topic | design storms temporal pattern rainfall duration hydraulic modeling urban flooding urbanized catchments |
| url | https://www.mdpi.com/2073-4441/12/7/2044 |
| work_keys_str_mv | AT ninokrvavica evaluationofdesignstormsandcriticalrainfalldurationsforfloodpredictioninpartiallyurbanizedcatchments AT josiprubinic evaluationofdesignstormsandcriticalrainfalldurationsforfloodpredictioninpartiallyurbanizedcatchments |