NDLI: Comparing of interpolation methods in rice cultivation vulnerability mapping due to groundwater quality in Guilan, north of Iran

Content Provider	IEEE Xplore Digital Library
Author	Pirmoradian, N. Rezaei, M. Davatgar, N. Tajdari, K. Abolpour, B.
Copyright Year	2010
Description	Author affiliation: Regional Water Company, Rasht, Iran (Tajdari, K.) \|\| Rice Research Institute, Rasht, Iran (Rezaei, M.; Davatgar, N.) \|\| Water Engineering Department, University of Guilan, Rasht, Iran (Pirmoradian, N.) \|\| Fars Agricultural Research Center, Shiraz, Iran (Abolpour, B.)
Abstract	Guilan is a famous province in growing rice in Iran. Recently, due to shortage of water, farmers' desire to use groundwater in order to grow rice in northern part of Iran has been increasing rapidly. The fact that rice is sensitive to water quality, caused concern about rice cultivation sustainability in the area, especially in drought years. This study was done to investigate the interpolation methods and the spatial variability of some important ground water quality factors including EC, SAR and Na of samples taken from 135 wells over the region at September of 2007. First, the accuracy of ordinary kriging (Ok) and inverse distance weighting (IDW) with 3 different powers (1, 2 and 3) in mapping the studied parameters were evaluated. Then the final map was presented. The result showed that spherical model gave the best result to simulate the vriograms. Although negligible differences were observed between the methods, Ok and IDW-1 performed better in comparison to the IDW-2 and IDW-3. The final map showed that EC in central part of the region, where the Sephidroud meets the Caspian Sea is dramatically high which will threaten the sustainability of rice cultivation in the area. The other factors were in suitable level.
Starting Page	147
Ending Page	150
File Size	785922
Page Count	4
File Format	PDF
ISBN	9781424486199
e-ISBN	9781424486212
DOI	10.1109/ICEEA.2010.5596110
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-10
Publisher Place	Singapore
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ordinary kriging Groundwater quality mapping Inverse distance weighting
Content Type	Text
Resource Type	Article

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