the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Identification of spatiotemporal patterns of biophysical droughts in semi-arid region – a case study of the Karkheh river basin in Iran
Abstract. This study aims at identifying historical patterns of meteorological, hydrological, and agricultural (inclusively biophysical) droughts in the Karkheh River Basin (KRB), one of the nine benchmark watersheds of the CGIAR Challenge Program on Water and Food. Standardized precipitation index (SPI), standardized runoff index (SRI), and soil moisture deficit index (SMDI) were used to represent the above three types of droughts, respectively. The three drought indices were compared across temporal and spatial dimensions. Variables required for calculating the indices were obtained from the Soil and Water Assessment Tool (SWAT) constructed for the region. The model was calibrated based on monthly runoff and yearly wheat yield using the Sequential Uncertainty Fitting (SUFI-2) algorithm. Five meteorological drought events were identified in the studied period (1980–2004), of which four corresponded with the hydrological droughts with 1–3 month lag. The meteorological droughts corresponded well with the agricultural droughts during dry months (May–August), while the latter lasted for a longer period of time. Analysis of drought patterns showed that southern parts of the catchment were more prone to agricultural drought, while less influenced by hydrological drought. Our analyses highlighted the necessity for monitoring all three aspects of drought for a more effective watershed management. The analysis on different types of droughts in this study provides a framework for assessing their possible impacts under future climate change in semi-arid areas.
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RC C2268: 'Review of - Identification of spatiotemporal patterns of biophysical droughts in semi-arid region – A case study of the Karkheh river basin in Iran', Anonymous Referee #1, 28 Jun 2015
- AC C2595: 'response to reviewer 1', Bahareh Kamali, 15 Jul 2015
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RC C2352: 'Review: "Identification of spatiotemporal patterns of biophysical droughts in semi-arid region – a case study of the Karkheh river basin in Iran"', Anonymous Referee #2, 02 Jul 2015
- AC C2602: 'Reply to reviewer number 2', Bahareh Kamali, 16 Jul 2015
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RC C2268: 'Review of - Identification of spatiotemporal patterns of biophysical droughts in semi-arid region – A case study of the Karkheh river basin in Iran', Anonymous Referee #1, 28 Jun 2015
- AC C2595: 'response to reviewer 1', Bahareh Kamali, 15 Jul 2015
-
RC C2352: 'Review: "Identification of spatiotemporal patterns of biophysical droughts in semi-arid region – a case study of the Karkheh river basin in Iran"', Anonymous Referee #2, 02 Jul 2015
- AC C2602: 'Reply to reviewer number 2', Bahareh Kamali, 16 Jul 2015
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Cited
4 citations as recorded by crossref.
- A modified soil water deficit index (MSWDI) for agricultural drought monitoring: Case study of Songnen Plain, China H. Yang et al. 10.1016/j.agwat.2017.07.022
- Characterization of Droughts in Humid Subtropical Region, Upper Kafue River Basin (Southern Africa) M. Lweendo et al. 10.3390/w9040242
- Better Drought Index between SPEI and SMDI and the Key Parameters in Denoting Drought Impacts on Spring Wheat Yields in Qinghai, China M. Hou et al. 10.3390/agronomy12071552
- Intensity–area–duration analysis of droughts in China 1960–2013 J. Zhai et al. 10.1007/s00382-016-3066-y