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sept10and15 - 3 transmitted*very few watershed...

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Sept. 10 th : -An ideal watershed is circular Mapping watersheds Characteristics of contour lines: 1. Single continuous lines always closes 2. Spacing indicates steepness 3. ‘V’ indicates a draw or stream course, points up stream 4. ‘U’ indicates a spur or ridges 5. Parallel large streams and rivers Ground forms on a map: *contour lines never cross* 1. Hill 2. Ridge 3. Saddle 4. Spur 5. Draw 6. Valley 7. Depression 8. Cliff Sept. 15 th : IV. Hydrologic cycle renewal times -Atmosphere 1-12 days -Rivers 10-30 days -Soil moisture 14-365 days -Freshwater lakes 1-100 years -Glaciers 1-16,000 years -Polar icecaps >30,000 years Energy balance concept: S o + T + L + G + C + S t = 0 *release of fossil fuels will affect this cycle S o = solar radiation T = thermal radiation L = latent heat G = conduction C = convection S t = storage—photosynthesis (sugars) -when radiation strikes a surface: 1. absorbed 2. reflected—albedo (reflective factor)
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Unformatted text preview: 3. transmitted *very few watershed surfaces/things transmit they either absorb or reflect Thermal characteristics of watersheds:-specific heat = amount of heat needed to raise 1g of water 1°C *soil 0.2°C specific heat -senseable heat—heat change you can measure -latent heat—thermal energy that does not change the temperature of an object -sublimation—solid gas-conduction—energy transfer, molecule molecule molecule -convection—energy transfers by mass movement of energy containing heat *advection—horizontal mass movement Mechanisms for heat transfer: 1. Radiation 2. Convection 3. Conduction Factors in convective heat transfer: 1. Wind speed of air 2. Temperature difference and vapor pressure gradients between the surface and air 3. Surface roughness (area)...
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