Introduction and Assessment of a New Drought Monitoring Index, MRDI (Case Study: Gorganroud Basin, Iran) | ||
| تحقیقات آب و خاک ایران | ||
| Article 4, Volume 46, Issue 1, April 2015, Pages 19-30 PDF (1.92 M) | ||
| Document Type: Research Paper | ||
| DOI: 10.22059/ijswr.2015.54292 | ||
| Authors | ||
| Hossein Dehban1; Kumars Ebrahimi* 2; Shahab Araghinejad3 | ||
| 1MSc Student of Water Resources Engineering, University of Tehran | ||
| 2Associate Professor, Irrigation and Reclamation Engineering Department, University of Tehran | ||
| 3Assistant Professor, Irrigation and Reclamation Engineering Department, University of Tehran | ||
| Abstract | ||
| In order to avoid drought effects, it is essential to detect and monitor the spatial and temporal changes of the phenomenon. In General, drought indices are made use of to achieve the goals. The main aim followed in this paper is to introduce and assess a new drought index termed MRDI. MRDI (Modified Reconnaissance Drought Index) is then compared with Modified Standardized Precipitation Index (MSPI), as based on the Standardized Precipitation Index (SPI) and the Reconnaissance Drought Index (RDI), involving a well-known statistical technique named Principal Component Analysis (PCA). Gorganroud basin, Iran, is taken as a Case Study. According to the obtained results, the new MRDI and also MSPI multivariate indices have shown to be of more accurate results and are also easier to use than the SPI and RDI univariant indices. A comparison of MRDI and MSPI results, as based upon the non-parametric Kolmogorov– Smirnov test in Gorganroud basin, has revealed that, there is no significant difference between them with their behavior similar in more than 90% of the cases. An evaluation and verification of the results of the study needs to be repeated in other representative basins. | ||
| Keywords | ||
| Drought; Time Multivariate Index; Principal component analysis | ||
| References | ||
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