Analysing Micro-Level Rainfall Trends: Implications for Water Conservation in Paravanar River Basin

Article type: Research Article

Authors: Krishnaveni, M. | Arunya, K.G.^{; *}

Affiliations: Institute of Ocean Management, Anna University, Chennai – 600025, India | Centre for Water Resources, Anna University, Chennai – 600025, India

Correspondence: [*] Corresponding Author. [email protected]

Abstract: High-intensity, short-duration rainfall resulting in flood hazards is one of the significant challenges now. On the other hand, this basin is affected by drought in the subsequent years because of the lack of conservation of floodwater and high elevation difference. Rainfall analysis is the preliminary study for suggesting the type of water conservation measures. This study analyzes the trend and change point at a micro-scale with its village boundaries for the Paravanar River basin. One hundred forty-eight villages under six blocks have increasing trends, 28 towns in the summer season using rain gauge dataset show decreasing trends which are considered negligible, and the rest of the villages have no trends. It is identified that; trend analysis works well with the extended data record. 1991 is the trend change point for gridded data, and 1995 is for the rain gauge data. The main aim of this study is to analyze the rainfall trends and their change point at a micro level and suggest mitigation measures with the indigenous facilities.

Keywords: Village-level trend analysis, annual and seasonal analysis of rainfall

DOI: 10.3233/AJW240054

Journal: Asian Journal of Water, Environment and Pollution, vol. 21, no. 5, pp. 1-14, 2024