TREND ANALYSIS OF GROUND-WATER LEVEL TO ASSESS VULNERABILITY OF GROUNDWATER IN CHITTAR SUB BASIN OF TAMIRABHARANI RIVER BASIN IN TAMIL NADU STATE

Meena Sakthivel Pandian; N Sridhar; Chinju Saju; P Athira

doi:10.46587/JGR.2022.v08i02.001

Meena Sakthivel Pandian Department of Agriculture Engineering, Hindusthan College of Engineering and Technology, Coimbatore, India
N Sridhar Department of Agriculture Engineering, Hindusthan College of Engineering and Technology, Coimbatore, India
Chinju Saju Department of Agriculture Engineering, Hindusthan College of Engineering and Technology, Coimbatore, India
P Athira Department of Agriculture Engineering,Hindusthan College of Engineering and Technology, Coimbatore, India

DOI: https://doi.org/10.46587/JGR.2022.v08i02.001

Keywords: Chittar Sub Basin, Groundwater Level, Groundwater Vulnerability, Mann–Kendall Test, Sen’s Slope Estimator

Abstract

In Chittar Sub basin, agricultural, domestic and industrial water use is highly dependent on groundwater extractions. For meeting the increasing demand of groundwater resources, it is highly important to realize about interrelation between agriculture, climate change impacts, groundwater levels and other water resources for agricultural purposes. Keeping this point, the study was under taken in Chittar sub basin of Tamirabharani river basin, Tamil Nadu for investigating the temporal trends in groundwater level using the Mann–Kendall test and the Sen’s slope estimator in the area during 1986–2020. The results of the tests indicated a mix of negative and positive trends in the groundwater level series. The positive trends were found to be higher than the negative trends. The statistical tests reported a significant increasing trend in 25 percent of the wells. Moreover, the highest number of wells with significant positive trends occurred in zone 2 and zone 3.