Rainfall-Altitude Relationship in Saudi Arabia
Relations between rainfall and the altitude of the terrain can have significant implications for rainfall-runoff studies in hydrology. The aim of this paper is to report on a study of relationships between annual and seasonal rainfall and the altitude of the terrain in Saudi Arabia (SA) using global...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2013/363029 |
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| author | Khalid Al-Ahmadi Sharaf Al-Ahmadi |
| author_facet | Khalid Al-Ahmadi Sharaf Al-Ahmadi |
| author_sort | Khalid Al-Ahmadi |
| collection | DOAJ |
| description | Relations between rainfall and the altitude of the terrain can have significant implications for rainfall-runoff studies in hydrology. The aim of this paper is to report on a study of relationships between annual and seasonal rainfall and the altitude of the terrain in Saudi Arabia (SA) using global ordinary least square (OLS) and local geographically weighted regression (GWR) methods. Results using the OLS method showed a significant correlation between altitude and spring rainfall, with a coefficient of determination of , but no significant correlation for the annual and other seasons’ rainfalls. The relationships were more pronounced when GWR local analysis was performed with coefficients of determination of , 0.64, 0.83, 0.82, and 0.71 for annual, winter, spring, summer, and fall rainfalls, respectively. There was some variation in the parameter estimates derived with GWR, but the majority of the estimates indicated a positive association. Results from this study corroborate those of selected other studies in which rainfall and altitude were found to be correlated spatially. The authors concluded that the use of a nonstationary local model such as GWR enabled them to provide a deeper explanation of relations between rainfall and the altitude of the terrain than a global model such as OLS in terms of spatial estimation and prediction. |
| format | Article |
| id | doaj-art-6aca278e5d7c4067a1efe2745234338e |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-6aca278e5d7c4067a1efe2745234338e2025-02-03T01:21:21ZengWileyAdvances in Meteorology1687-93091687-93172013-01-01201310.1155/2013/363029363029Rainfall-Altitude Relationship in Saudi ArabiaKhalid Al-Ahmadi0Sharaf Al-Ahmadi1King Abdulaziz City for Science and Technology, P.O. Box 6086, Riyadh 11442, Saudi ArabiaTaibah University, P.O. Box 344, Madinah 30001, Saudi ArabiaRelations between rainfall and the altitude of the terrain can have significant implications for rainfall-runoff studies in hydrology. The aim of this paper is to report on a study of relationships between annual and seasonal rainfall and the altitude of the terrain in Saudi Arabia (SA) using global ordinary least square (OLS) and local geographically weighted regression (GWR) methods. Results using the OLS method showed a significant correlation between altitude and spring rainfall, with a coefficient of determination of , but no significant correlation for the annual and other seasons’ rainfalls. The relationships were more pronounced when GWR local analysis was performed with coefficients of determination of , 0.64, 0.83, 0.82, and 0.71 for annual, winter, spring, summer, and fall rainfalls, respectively. There was some variation in the parameter estimates derived with GWR, but the majority of the estimates indicated a positive association. Results from this study corroborate those of selected other studies in which rainfall and altitude were found to be correlated spatially. The authors concluded that the use of a nonstationary local model such as GWR enabled them to provide a deeper explanation of relations between rainfall and the altitude of the terrain than a global model such as OLS in terms of spatial estimation and prediction.http://dx.doi.org/10.1155/2013/363029 |
| spellingShingle | Khalid Al-Ahmadi Sharaf Al-Ahmadi Rainfall-Altitude Relationship in Saudi Arabia Advances in Meteorology |
| title | Rainfall-Altitude Relationship in Saudi Arabia |
| title_full | Rainfall-Altitude Relationship in Saudi Arabia |
| title_fullStr | Rainfall-Altitude Relationship in Saudi Arabia |
| title_full_unstemmed | Rainfall-Altitude Relationship in Saudi Arabia |
| title_short | Rainfall-Altitude Relationship in Saudi Arabia |
| title_sort | rainfall altitude relationship in saudi arabia |
| url | http://dx.doi.org/10.1155/2013/363029 |
| work_keys_str_mv | AT khalidalahmadi rainfallaltituderelationshipinsaudiarabia AT sharafalahmadi rainfallaltituderelationshipinsaudiarabia |