GLY 101 11th Edition Lecture 24Outline of Last Lecture I. The work of Running WaterStream ChannelsShaping Stream ValleysOutline of Current Lecture II. Distribution of GroundwaterIII. The Water TableIV. Factors Influencing the Storage and Movement of GroundwaterCurrent LectureII. Distribution of Groundwater- the near surface zone is the zone of soil moisture- the zone of saturation is also called the phreatic zone-the water table is above this zone- the capillary fringe is above the water table- the area above the water table that includes the capillary fringe and the zone of soil moisture iscalled the unsaturated zone- unsaturated zone also known as the vadose zoneIII. The Water Table-gaining streams receive water from the ground water system- losing streams (connected) provide water to the ground water system-losing streams ( disconnected) happen when losing streams are separated from the groundwater system by the unsaturated zone- losing streams can be connected to the groundwater system by a continuous saturated zone / disconnected by an unsaturated zoneThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.IV. Factors Influencing the Storage and Movement of Groundwater-the quantity of groundwater depends on the porosity- porosity is the percentage of the total volume of rock or sediment that consists of pore spaces- porosity is reduced where sediments are poorly sorted-pore space depends on the size and shape of the grains, how they are packed together, the degree of sorting, and in sedimentary rocks, the amount of cementing material-permeability is the material’s ability to transmit fluid- the smaller the pore space the slower the water moves-groundwater is divided into 2 categories: specific yielding, the portion that will drain under the influence of gravity, and specific retention, the part that is retained as a film on particle and rock surfacesand in tiny openings-impermeable layers that prevent water movement are aquitards- permeable sediment that transmit ground water freely are called
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