Rainfall - Runoff Process and Rainfall Analysis for Nablus Basin
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Date
2000
Authors
Naim Ibrahim Al-Nubani
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Abstract
The analysis of precipitation is essential for the hydrological studies and design. For the West Bank, there is no enough precipitation data available especially for short duration, hourly and daily precipitation. Therefore it is essential to develop the required plots and relations and made their available for use.
This should be achieved depending on the available rainfall data of specific durations such as producing the IDF curves. In order to contribute to this need, the rainfall data used for the Nablus district were collected from the Nablus Meteorological station and were used for the rainfall-runoff relationship as one other important issue was also discussed for one catchment area in Nablus district basing on the available rainfall data. The annual, monthly and daily precipitation data for Nablus Meteorological station were used in the analysis. Gumble distribution shows the best fit for annual rainfall. The analysis also included the development of the Intensity Duration Frequency curves for Nablus district. The most rainy month of January and the monthly rainfall distribution have the same style for the period of 1954-1998. Using the developed rainfall-runoff relation, Synthetic Unit Hydrograph was developed for Rujeep catchment near Nablus. It was found that the runoff occurs when the rainfall exceeds 48.5 mm for a period of 15-hr.
It is proposed that efforts must be further invested into data gathering especially for stream flow data, intensity and duration of rainfall. These data should be used in the development of rainfall- runoff relationship for the different catchment areas.
The analysis of precipitation is essential for the hydrological studies and design. For the West Bank, there is no enough precipitation data available especially for short duration, hourly and daily precipitation. Therefore it is essential to develop the required plots and relations and made their available for use. This should be achieved depending on the available rainfall data of specific durations such as producing the IDF curves. In order to contribute to this need, the rainfall data used for the Nablus district were collected from the Nablus Meteorological station and were used for the rainfall-runoff relationship as one other important issue was also discussed for one catchment area in Nablus district basing on the available rainfall data. The annual, monthly and daily precipitation data for Nablus Meteorological station were used in the analysis. Gumble distribution shows the best fit for annual rainfall. The analysis also included the development of the Intensity Duration Frequency curves for Nablus district. The most rainy month of January and the monthly rainfall distribution have the same style for the period of 1954-1998. Using the developed rainfall-runoff relation, Synthetic Unit Hydrograph was developed for Rujeep catchment near Nablus. It was found that the runoff occurs when the rainfall exceeds 48.5 mm for a period of 15-hr. It is proposed that efforts must be further invested into data gathering especially for stream flow data, intensity and duration of rainfall. These data should be used in the development of rainfall- runoff relationship for the different catchment areas.
The analysis of precipitation is essential for the hydrological studies and design. For the West Bank, there is no enough precipitation data available especially for short duration, hourly and daily precipitation. Therefore it is essential to develop the required plots and relations and made their available for use. This should be achieved depending on the available rainfall data of specific durations such as producing the IDF curves. In order to contribute to this need, the rainfall data used for the Nablus district were collected from the Nablus Meteorological station and were used for the rainfall-runoff relationship as one other important issue was also discussed for one catchment area in Nablus district basing on the available rainfall data. The annual, monthly and daily precipitation data for Nablus Meteorological station were used in the analysis. Gumble distribution shows the best fit for annual rainfall. The analysis also included the development of the Intensity Duration Frequency curves for Nablus district. The most rainy month of January and the monthly rainfall distribution have the same style for the period of 1954-1998. Using the developed rainfall-runoff relation, Synthetic Unit Hydrograph was developed for Rujeep catchment near Nablus. It was found that the runoff occurs when the rainfall exceeds 48.5 mm for a period of 15-hr. It is proposed that efforts must be further invested into data gathering especially for stream flow data, intensity and duration of rainfall. These data should be used in the development of rainfall- runoff relationship for the different catchment areas.