HYDROLOGY (L6) By Cg. Dk. Malia Pg. Hj. Damit. Geography Department
HYDROLOGY DEFINITION hydrology Hydrological cycle SYSTEM OPENED CLOSED D.BASIN HYDROLOGICAL CYCLE 1.1. DRAINAGE BASIN DEFINITION DIAGRAM FLOW DIAGRAM WATER BALANCE 1.2.STORM HYDROGRAPH
Evapotranspiration Condensation Liquid water turns into a vapour as it absorbed by air. Plants release Water through tiny Holes (stomata) on Underside of leaves. Combined water Loss by evaporation & transpiration. A general term for all Water moving through the atmosphere in liquid or solid form towards the Earth’s surface . HYDROLOGICAL CYCLE : the circular system by which water is transferred Between the oceans and the land masses. As the air cools water vapour turns into tiny droplets of Water called cloud.
A drainage basin is a region of land where water from rain or snow melt drains downhill into a body of water, such as a river , lake , dam , estuary , wetland , sea or ocean .
Interception : first raindrops of a rainfall event will fall on vegetation. Infiltration : Water that reaches ground surface will soak into soil. Overland flow : water moving over the ground. Throughfall : water that drip down leaf to leaf. Percolation : Some water sinks deep into the earth (percolates) through openings in the soil. Stemflow : water that flow down tree thrunks or plant stems. Groundwater : water transfer through permeable rocks from the soil above. Baseflow : water flows from groundwater stores to the stream Throughflow : water moving through the soil. Surface run-off : water that flows over the land surface. TERMS
FLOW DIAGRAM THROUGH A DRAINAGE BASIN TRANSPIRATION INTERCEPTION SURFACE STORAGE SOIL WATER STORAGE EVAPORATION GROUNDWATER STORAGE CHANNEL STORAGE RIVER RUNOFF VEGETATION STORAGE PERCIPITATION inputs storage outputs stemflow infiltration percolation baseflow throughflow Surface flow Channel flow