Impact of Climate Change on Gravity Flow Drinking Water Resource in the Upper Kosi Watershed, Lesser Himalaya

In the age of climate change, hydrological cycle is most sensitive which being adversely affected. The natural water sources such as springs, rivulets, rivers etc non-glacial fed watershed in Uttarakhand are drying and dying steadily disturbing society’s economy, environment creating threat on livelihood ecosystem region. basic goal current paper to evaluate impact change gravity flow drinking resource study area, Lesser Himalaya, Uttarakhand. For this objective, hydrometeorological data analyzed paper. meteorological data, i.e., mean temperature (y = 0.059x + (-) 102.07) average annual rainfall 2.759x 4546.41) shows an increasing trend while a decreasing over time. that spite pattern, groundwater has been depleted significantly area caused by rhythm disturbed recharging capacity soil into aquifers baseflow discharge sources. Due all these changes, have perturbed badly imposing supply villages area. At present, there 93 schemes On average, at their establishment year was recorded 40.11 l/m decreased 23.46 2018. Thus, about 16.65 each scheme since year. These how alarmingly depleting Therefore, suggests source rejuvenation program for sustenance sources,