Prior study on district level inherent climate vulnerability assessment of Mizoram: Water Resources Approach resulted in identification of the most vulnerable district in terms of domestic water resources availability. Tier 2 assessment targeting the most vulnerable district i.e., Champhai district was done to rank and categorised different villages based on their vulnerability indices and drivers of vulnerability were also identified. Indicators based bottoms up approach using a combination of primary data, secondary data collected from various sources and geospatial data were used. A total of 86 villages were selected for unit of measurement. Urban towns were discarded for the study as result were bound to be skewed towards them. Possible indicators were pre surveyed from published literatures by considering the possibility of data collection at ground reality. Primary data were collected using a predesigned questionnaire at villages during a span of November 2022 to October 2023. Among numerous available indicators from the data collected, 15 possible indicators were initially selected. However, after removing highly correlated indicators, assessment was done using a set of 10 indicators namely, Litre Per Minute (LPM) of natural water source per 100 population, community reservoir capacity, litres of water available per household in a day, Seasonal reduction (%) of main water source, % of perennial water source owned by village, Diversity of perennial water sources, % household with water storage capacity below 500 ltrs, % household with water purchase power, % geographical area under good groundwater potential, % area under high Topographical Wetness Index. Composite Vulnerability Indices (CVI) were calculated from the scores of the 10 indicators, villages were ranked accordingly, 29 villages were categorised under high vulnerable classes, 29 villages were classes under medium vulnerability and 28 villages under low vulnerability. The major drivers were Litre Per Minute (LPM) of natural water source per 100 population, community reservoir capacity and litres of water available per household in a day.

Drivers of Vulnerability