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ICSE Class X Notes 2020 : Geography

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Compiled by Michelle Sequeira and Pranav Yadav WATER RESOURCES Importance: Rainfall seasonal. Crops grown throughout. Some areas receive more than others. Rice grown everywhere. Rainfall highly erratic & unpredictable Some crops require more than others Some soils don t absorb as much water as others Means: Conventional Wells, Tube wells, Canals, Tanks Non-conventional Furrows, Sprinkler, Drip, Rainwater harvesting WELLS: dugout/hollow made in ground Places: Northern Plains, UP, Bihar Why in Northern Plains? Underground water table is high as region is drained by perennial rivers Region has alluvial soil which is soft and easy to dig Farmers have small landholdings which facilitate the building of wells as it occupies less space Advantages: Cheap Easy Subjected to less evaporation Occupies less space Convenient to dig by individual farmers Underground water is rich in minerals which add to the fertility of the soil Disadvantages: Wells may run dry due to excessive use Water table decreases in summer Evaporation is higher for unlined wells Water may turn brackish or salty unfit for cultivation www.icsehelpline101.wordpress.com

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