![]() ![]() The proportion of stream water that comes from groundwater inflow varies according to a region's geography, geology, and climate. Groundwater contributes to streamsin most physiographic and climatic settings. Some, and often a great deal, of the water flowing in rivers comes from seepage of groundwater into the streambed. There is more of an interaction between the water in lakes and rivers and groundwater than most people think. Also, as water levels decline, the rate of water the well can yield may decline. If groundwater levels decline too far, then the well owner might have to deepen the well, drill a new well, or, at least, attempt to lower the pump. For water to be withdrawn from the ground, water must be pumped from a well that reaches below the water table. The most severe consequence of excessive groundwater pumping is that the water table, below which the ground is saturated with water, can be lowered. Pumping has removed water from storage in basalt aquifers and caused declines in many areas of the Columbia Plateau. Pumping groundwater at a faster rate than it can be recharged can have some negative effects of the environment and the people who make use of the water: What are some effects of groundwater depletion? ![]() reduction of water in streams and lakes.Some of the negative effects of groundwater depletion: Groundwater depletion is primarily caused by sustained groundwater pumping. The volume of groundwater in storage is decreasing in many areas of the United States in response to pumping. Pumping water out of the ground faster than it is replenished over the long-term causes similar problems. If you withdraw money at a faster rate than you deposit new money you will eventually start having account-supply problems. The water stored in the ground can be compared to money kept in a bank account. Many areas of the United States are experiencing groundwater depletion.Įxcessive pumping can overdraw the groundwater "bank account" Groundwater depletion, a term often defined as long-term water-level declines caused by sustained groundwater pumping, is a key issue associated with groundwater use. In the United States, it is the source of drinking water for about half the total population and nearly all of the rural population, and it provides over 50 billion gallons per day for agricultural needs. Where surface water, such as lakes and rivers, are scarce or inaccessible, groundwater supplies many of the hydrologic needs of people everywhere. Groundwater is a valuable resource both in the United States and throughout the world. Pumping groundwater faster than it can recharge can lead to dry wells, especially during droughts. Sources/Usage: Some content may have restrictions. ![]()
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