RAINFALL EROSIVITY MAPPING IN KERMAN PROVINCE BASED ON GEOSTATISTICAL METHODS

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KAVIAN ATAOLLAH; JAFARIAN ZEINAB; JAHANSHAHI AFSHIN; GOLSHAN MOHAMMAD

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Journal: Physical Geography Research Year:2016 | Volume:48 | Issue:1 Page(s): 51-68

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Title

RAINFALL EROSIVITY MAPPING IN KERMAN PROVINCE BASED ON GEOSTATISTICAL METHODS

Author(s)

KAVIAN ATAOLLAH | JAFARIAN ZEINAB | JAHANSHAHI AFSHIN | GOLSHAN MOHAMMAD | Issue Writer Certificate

Keywords

CROSS-VALIDATIONQ1

EI30Q1

KERMAN PROVINCEQ1

INDEXQ1

RECORDING RAIN GAUGESQ1

Abstract

IntroductionRainfall erosivity, the propulsion or power of causing erosion in separation and transport of soil particles, is in relation to water erosion. Rainfall erosion is causing loss of soil, damage to agriculture and infrastructures which is followed by water pollution. Changes in rainfall patterns exacerbate risk of erosion globally. Rainfall erosivity plays an effective role in soil erosion and represents potential erosion in the study areas. Following the rainfall erosion, all types of water erosion can be occurred. Consequently, it not only makes soil to be eroded but also lead to filling of dam reservoirs, channels, water pollution and ecological changes. Regarding these mentioned problems, it is necessary to investigate various aspects of water erosion. Under the same condition, rate of soil loss is directly proportional to the rainfall erosivity. This can be expressed as erosivity factors which are based on rainfall characteristics. Various researchers have attempted to provide factors that are based on rainfall characteristics using simultaneous measurement of soil splash (or soil loss) and rainfall characteristics to determine relationships between them. Various factors have been proposed throughout the world. These factors are different because of geographical location, scale, local conditions and type of instruments. The concept of rainfall erosivity was proposed by wischmeier and smith (1958) in order to consider the effects of climate on soil erosion. Rainfall erosivity can be determined either using direct measurements or appropriate factors. Direct measurement method is a suitable method to determine rainfall erosivity which is done by measuring the amount of splashed soil. Event-based measurement of erosivity of rainfall for broad area is difficult and time-consuming. Therefore, researchers have attempted to provide factors that are based on rainfall characteristics using simultaneous measurement of soil loss and rainfall characteristics and relationships between them. For different areas, rainfall erosivity can be determined using these characteristics without direct measurement. In general, rainfall erosivity factors can be divided into two groups: 1) factors based on energy and intensity of rainfall; 2) factors based on readily available data. One of the most famous factors is EI30 which is based on kinetic energy and intensity of rainfall. One limitation in using this factor and also other factors which are based on rainfall erosivity is that they need long-term data (>20years) recorded with short intervals. Such data are recorded in the stations equipped with rain gauge. Therefore, due to lack of these long-term data, researchers have proposed factors that use available rainfall data (i.e., daily and monthly data). This recent factors are computed based on regional sediment analysis or its relationship with EI30.The purpose of this study is to prepare rainfall erosivity map for KERMAN PROVINCE with semi-arid climate and to determine the most suitable interpolation method. Although such a map has been produced by Nicknami (2014) for Iran, it's not available for Kerman specifically.

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APA: Copy

KAVIAN, ATAOLLAH, JAFARIAN, ZEINAB, JAHANSHAHI, AFSHIN, & GOLSHAN, MOHAMMAD. (2016). RAINFALL EROSIVITY MAPPING IN KERMAN PROVINCE BASED ON GEOSTATISTICAL METHODS. PHYSICAL GEOGRAPHY RESEARCH QUARTERLY, 48(1), 51-68. SID. https://sid.ir/paper/138764/en

Vancouver: Copy

KAVIAN ATAOLLAH, JAFARIAN ZEINAB, JAHANSHAHI AFSHIN, GOLSHAN MOHAMMAD. RAINFALL EROSIVITY MAPPING IN KERMAN PROVINCE BASED ON GEOSTATISTICAL METHODS. PHYSICAL GEOGRAPHY RESEARCH QUARTERLY[Internet]. 2016;48(1):51-68. Available from: https://sid.ir/paper/138764/en

IEEE: Copy

ATAOLLAH KAVIAN, ZEINAB JAFARIAN, AFSHIN JAHANSHAHI, and MOHAMMAD GOLSHAN, “RAINFALL EROSIVITY MAPPING IN KERMAN PROVINCE BASED ON GEOSTATISTICAL METHODS,” PHYSICAL GEOGRAPHY RESEARCH QUARTERLY, vol. 48, no. 1, pp. 51–68, 2016, [Online]. Available: https://sid.ir/paper/138764/en

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