If you know how much water enters a lake and how much leaves, you can figure out the net change in the lake's total water volume and, consequently, the direction and magnitude of its water level change. Water entering a lake, referred to as total inflow, encompasses all water sources that contribute to the lake's volume, such as rivers and streams flowing in, direct precipitation (rain or snow) falling onto the lake's surface, and groundwater seeping into the lake. Water leaving a lake, referred to as total outflow, encompasses all ways water exits the lake, suc....
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