Climate change is expected to increase the frequency of heavy precipitation in the United States, which can harm crops by eroding soil and depleting soil nutrients. Heavy rains can also increase agricultural runoff into oceans, lakes, and streams. This runoff can harm water quality.Increased flooding, including that caused by sea-level rise, may lead to substantial losses in crop production in low-lying agricultural areas and may contribute to compaction, water logging and erosion of soil. Climate change can affect water resources through several dimensions: changes in the amount and patterns of precipitation; impact on water quality through changes in runoff, river flows, retention and thus loading of nutrients; and through extreme events such as floods and droughts. Climate change affects farming in a number of ways, including through changes in average temperatures, rainfall, and climate extremes changes in pests and diseases, changes in atmospheric carbon dioxide and ground-level ozone concentrations, changes in the nutritional quality of some foods. Climate change is disrupting weather patterns, leading to extreme weather events, unpredictable water availability, exacerbating water scarcity and contaminating water supplies.

Climate change threatens the quality of source water through increased runoff of pollutants and sediment, decreased water availability from drought and saltwater intrusion, as well as adversely affecting overall efforts to maintain water quality. Climate change tends to increase the frequency and intensity of rainfall; there may be an increase in the occurrence of flooding due to heavy rainfall events. Groundwater recharge may also be affected with a reduction in the availability of groundwater for drinking water in some regions. The effects of climate change on agriculture can result in lower crop yields and nutritional quality due to drought, heat waves and flooding as well as increases in pests and plant diseases. These processes in association with a shifting pattern of precipitation may affect the spatial and temporal distribution of runoff, soil moisture, ground water resources etc and may increase the frequency of drought and floods. Extreme conditions exist in India these are flood followed by drought. Melting of glaciers and snow cover as a result of rising temperatures leads to a decrease in water supplies, thereby reducing water availability during warm and dry periods in regions supplied with melt water from mountain ranges.Climate change further poses a challenge to food security challenges with its influence on food production, costs, and security. Excessive heat or shortage of water can impede crop growth; reduce yields, and influence irrigation, soil quality, and the ecosystem on which agriculture depends.

Because climatic parameters are determinant factors of agriculture, water resource availability, and other related natural resources