Investigation of Spatial Variability of Precipitation Concentration and Rainfall Erosivity Indices in Khuzestan Province

eslami, hossein

doi:10.29252/jwmr.9.17.109

Volume 9, Issue 17 (9-2018) J Watershed Manage Res 2018, 9(17): 109-118 | Back to browse issues page

‎ 10.29252/jwmr.9.17.109

‎ 20.1001.1.22516174.1397.9.17.15.7

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eslami H. (2018). Investigation of Spatial Variability of Precipitation Concentration and Rainfall Erosivity Indices in Khuzestan Province. J Watershed Manage Res. 9(17), 109-118. doi:10.29252/jwmr.9.17.109
URL: http://jwmr.sanru.ac.ir/article-1-690-en.html

Investigation of Spatial Variability of Precipitation Concentration and Rainfall Erosivity Indices in Khuzestan Province

Hossein Eslami ^*

Abstract: (2985 Views)

Rainfall variability and its impact on water resources are important climatic issues. Intra-annual variations in rainfall are characterized as precipitation concentration index (PCI). Another feature that directly correlates with the concentration of precipitation is the rain erosivity (Modified Fournier Index MFI). The aim of this study is to investigate the PCI and MFI indices and map their spatial variations. The Modified Fournier and precipitation Concentration indices were calculated using rainfall data from 55 meteorological stations located in Khuzestan province. To produce the spatial variations map, point information is converted to regional using geostatistical and deterministic methods. The results indicated that the ordinary and simple Kriging with Gaussian type have highest accuracy for interpolation of the PCI and MFI indices, respectively. According to the spatial variation map of the PCI, the highest values of that index are seen in the southern region and the lowest values are in the north and northeast of the Khuzestan province. The PCI values ranged between 20 and 31 indicating severe seasonality. The MFI values vary from 49 to 224 in which the highest values are for the northeast region of the province and the lowest ones are for the south and southwest zones. Generally Rainfall limited in a certain months.alues are for the northeast region of the province and the lowest ones are for the south and southwest zones. Generally Rainfall limited in a certain months.

Keywords: Geostatistics, Interpolation, Precipitation Concentration, Modified Fournier

Full-Text [PDF 743 kb] (1254 Downloads)

Type of Study: Research | Subject: هيدرولوژی
Received: 2016/08/15 | Accepted: 2017/09/5

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