Water an important source for human beings. The major source of water is the rainfall which is the key factor in determining the sustainability and conservation of living organisms on the earth. Around 80 % of the rainfall occurs during monsoon seasons which results in floods and sometimes results in drought due to the seasonal variations. Hence, it is necessary to analyze the rainfall during the seasonal period. The present study deals with the characteristics of rainfall of the northern part of Erode District. The rainfall data for the period of 20 years (1993-2012) were collected with a mean monthly rainfall data of the five rain gauge stations located in the study area, analyzed and categorized as four different seasons. These rainfall data were used to obtain the rainfall pattern by Geographical information system (GIS) and the spatial distribution maps for all the four seasons were prepared by Inverse Distance Method in ArcGIS. The study shows that the area covers under high rainfall is 51.74 km², 1332.24 km² and 1492.13 km² during pre-monsoon season, South west monsoon and North East monsoon and during post-monsoon the low intensity of rainfall were observed which covers around 1492.13 km² of the study area.

中文翻译：

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基于GIS的印度泰米尔纳德邦埃罗德区北部降雨的空间分析。

水是人类的重要来源。雨水是水的主要来源，降雨是决定地球上生物体的可持续性和保护性的关键因素。大约80％的降雨发生在季风季节，导致洪水，有时由于季节变化而导致干旱。因此，有必要对季节性降雨进行分析。本研究针对的是埃罗德地区北部的降雨特征。收集了20年（1993年至2012年）期间的降雨数据，并获得了研究区域内五个测雨站的月平均降雨数据，进行了分析并将其分为四个不同的季节。这些降水数据通过地理信息系统（GIS）来获得降雨模式，并通过反距离法在ArcGIS中绘制了所有四个季节的空间分布图。研究表明，高降雨条件下的覆盖面积为51.74 km²，1332.24公里²和1492.13公里²时前雨季，西南季风和东北季风，并在后季风观察周围1492.13公里覆盖降雨强度低²研究区。