Preparing Curve Number Map of Run-off and Investigating its Precision Using Hydrological Model (Case Study: Navdar Catchment)
Curve Number (CN) is one of the required parameters for runoff calculation using SCS method. Considering spatial variability of factors affecting this parameter, different values of CN is expected within different parts across a catchment. The present research aims to map CN in Navdar catchment, Ker...
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Razi University
2013-11-01
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| Series: | جغرافیا و پایداری محیط |
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| Online Access: | https://ges.razi.ac.ir/article_708_87ecb3c01aea3ec48de97af9ac2e7b71.pdf?lang=en |
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| author | Narjes Omidi Bahman Farhadi Samira Rahimi Homayon Hesadi |
| author_facet | Narjes Omidi Bahman Farhadi Samira Rahimi Homayon Hesadi |
| author_sort | Narjes Omidi |
| collection | DOAJ |
| description | Curve Number (CN) is one of the required parameters for runoff calculation using SCS method. Considering spatial variability of factors affecting this parameter, different values of CN is expected within different parts across a catchment. The present research aims to map CN in Navdar catchment, Kermanshah province, Iran. Therefore, modern technologies such as geographical information system (GIS) and remote sensing (RS) have been used. First, land use map of the study area was determined based on Landsat satellite images (TM) using ERDAS software package. Then ground coverage density was determined based on Normalized Difference Vegetation Index (NDVI). The map of soil hydrological groups was prepared in GIS environment based on the available soil map in the study area. Finally, CN map was prepared based on SCS table and the maps of land-use, ground coverage density, and soil hydrological group. Average curve number under intermediate humidity conditions in the study area was calculated as 78. Simultaneously, CN in the catchment was determined as 76 by the analysis of recorded runoff events using HEC-HMS model. Results of this study indicate that the accuracy of calculated curve number via RS and GIS technique is high, so the obtained curve numbers using RS and GIS method across this catchment are reliable. Based on the determined curve number in the catchment (78), it can be concluded that this catchment has high potentials in terms of runoff generation. |
| format | Article |
| id | doaj-art-1ccc90339e964772bf119199816e8141 |
| institution | Kabale University |
| issn | 2322-3197 2676-5683 |
| language | fas |
| publishDate | 2013-11-01 |
| publisher | Razi University |
| record_format | Article |
| series | جغرافیا و پایداری محیط |
| spelling | doaj-art-1ccc90339e964772bf119199816e81412025-02-04T13:07:58ZfasRazi Universityجغرافیا و پایداری محیط2322-31972676-56832013-11-01346573Preparing Curve Number Map of Run-off and Investigating its Precision Using Hydrological Model (Case Study: Navdar Catchment)Narjes Omidi Bahman Farhadi Samira Rahimi Homayon HesadiCurve Number (CN) is one of the required parameters for runoff calculation using SCS method. Considering spatial variability of factors affecting this parameter, different values of CN is expected within different parts across a catchment. The present research aims to map CN in Navdar catchment, Kermanshah province, Iran. Therefore, modern technologies such as geographical information system (GIS) and remote sensing (RS) have been used. First, land use map of the study area was determined based on Landsat satellite images (TM) using ERDAS software package. Then ground coverage density was determined based on Normalized Difference Vegetation Index (NDVI). The map of soil hydrological groups was prepared in GIS environment based on the available soil map in the study area. Finally, CN map was prepared based on SCS table and the maps of land-use, ground coverage density, and soil hydrological group. Average curve number under intermediate humidity conditions in the study area was calculated as 78. Simultaneously, CN in the catchment was determined as 76 by the analysis of recorded runoff events using HEC-HMS model. Results of this study indicate that the accuracy of calculated curve number via RS and GIS technique is high, so the obtained curve numbers using RS and GIS method across this catchment are reliable. Based on the determined curve number in the catchment (78), it can be concluded that this catchment has high potentials in terms of runoff generation.https://ges.razi.ac.ir/article_708_87ecb3c01aea3ec48de97af9ac2e7b71.pdf?lang=encurve numberfloodremote sensingrunoff-rainfall modelhec-hms model |
| spellingShingle | Narjes Omidi Bahman Farhadi Samira Rahimi Homayon Hesadi Preparing Curve Number Map of Run-off and Investigating its Precision Using Hydrological Model (Case Study: Navdar Catchment) جغرافیا و پایداری محیط curve number flood remote sensing runoff-rainfall model hec-hms model |
| title | Preparing Curve Number Map of Run-off and Investigating its Precision Using Hydrological Model (Case Study: Navdar Catchment) |
| title_full | Preparing Curve Number Map of Run-off and Investigating its Precision Using Hydrological Model (Case Study: Navdar Catchment) |
| title_fullStr | Preparing Curve Number Map of Run-off and Investigating its Precision Using Hydrological Model (Case Study: Navdar Catchment) |
| title_full_unstemmed | Preparing Curve Number Map of Run-off and Investigating its Precision Using Hydrological Model (Case Study: Navdar Catchment) |
| title_short | Preparing Curve Number Map of Run-off and Investigating its Precision Using Hydrological Model (Case Study: Navdar Catchment) |
| title_sort | preparing curve number map of run off and investigating its precision using hydrological model case study navdar catchment |
| topic | curve number flood remote sensing runoff-rainfall model hec-hms model |
| url | https://ges.razi.ac.ir/article_708_87ecb3c01aea3ec48de97af9ac2e7b71.pdf?lang=en |
| work_keys_str_mv | AT narjesomidi preparingcurvenumbermapofrunoffandinvestigatingitsprecisionusinghydrologicalmodelcasestudynavdarcatchment AT bahmanfarhadi preparingcurvenumbermapofrunoffandinvestigatingitsprecisionusinghydrologicalmodelcasestudynavdarcatchment AT samirarahimi preparingcurvenumbermapofrunoffandinvestigatingitsprecisionusinghydrologicalmodelcasestudynavdarcatchment AT homayonhesadi preparingcurvenumbermapofrunoffandinvestigatingitsprecisionusinghydrologicalmodelcasestudynavdarcatchment |