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Solid Earth An interactive open-access journal of the European Geosciences Union

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doi:10.5194/se-2016-112
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
15 Aug 2016
Review status
This discussion paper has been under review for the journal Solid Earth (SE). The revised manuscript was not accepted.
Using ordered weight averaging (OWA) for multicriteria soil fertility evaluation by GIS (case study: southeast Iran)
Marzieh Mokarram1 and Majid Hojati2 1Department of Range and Watershed Management, College of Agriculture and Natural Resources of Darab, Shiraz University, Iran
2Department of GIS and RS, University of Tehran, Faculty of Geography, Dep. of RS & GIS
Abstract. The Multi-criteria Decision Analysis (MCDA) and the Geographical Information Systems (GIS) are used to provide more accurate decisions for decision makers in order to evaluate the effective factors of the natural science. One of the popular algorithms of the multi-criteria analysis is the Ordered Weighted Averaging (OWA). The OWA procedure depends on some parameters which can be specified by means of the fuzzy logic. The aim of this study is to take the advantage of incorporating the fuzzy logic into GIS-based soil fertility analysis by OWA in the west of Shiraz, Fars province, Iran. In fact, different soil fertility maps with different risk level are prepared in the present study. This study introduces a method for farmers in case of make balance between their budget and their farm soil parameters. A farmer can accept more risk it can use more areas for farming and also the amount of needed budget increases too. For determining the soil fertility maps, the OWA parameters such as potassium (K), phosphor (P), copper (Cu), iron (Fe), manganese (Mn), organic carbon (OC) and zinc (Zn) were used. After generating the interpolation maps with the Inverse Distance Weighted (IDW), the fuzzy maps were generated by the membership functions for each parameter. Finally, by utilizing OWA, six fertility maps with different risk levels (degrees of uncertainty) were made. The results show that by decreasing the risk (no trade-off), increasing the risk, more area within the study area was suitable in terms of the soil fertility. Therefore, using OWA can generate many maps with different risk levels. This leads to different managements based on different financial conditions of farmers.

Citation: Mokarram, M. and Hojati, M.: Using ordered weight averaging (OWA) for multicriteria soil fertility evaluation by GIS (case study: southeast Iran), Solid Earth Discuss., doi:10.5194/se-2016-112, 2016.
Marzieh Mokarram and Majid Hojati
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC1: 'Review comments', Anonymous Referee #1, 10 Sep 2016 Printer-friendly Version 
AC1: 'reply to reviwers', Majid Hojati, 07 Nov 2016 Printer-friendly Version Supplement 
 
RC2: 'Review', Anonymous Referee #2, 22 Sep 2016 Printer-friendly Version 
AC2: 'response', Majid Hojati, 07 Nov 2016 Printer-friendly Version Supplement 
 
RC3: 'Review', Anonymous Referee #3, 26 Sep 2016 Printer-friendly Version 
AC3: 'Response to reviewer', Majid Hojati, 07 Nov 2016 Printer-friendly Version Supplement 
Marzieh Mokarram and Majid Hojati
Marzieh Mokarram and Majid Hojati

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Short summary
The aim of this study is to take the advantage of the incorporation of fuzzy into GIS-based soil fertility analysis by OWA in west Shiraz, Fars province, Iran. The results show that with decreasing risk (no trade-off), almost all of the parts of the study area were not suitable for soil fertility. While increasing risk, more area was suitable in terms of soil fertility in the study area.
The aim of this study is to take the advantage of the incorporation of fuzzy into GIS-based soil...
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