Term
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Definition
| Formed by natural stream processes subject to flooding |
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Term
| Describe Floodplain Zoning |
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Definition
| Divisions of floodplain depending on recurrence interval of different sized floods (10, 25, 50, 100-year) |
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Term
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Definition
| Frequency of occurrence of a flood of a given size or average number of years between two floods of same size |
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Term
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Definition
| Indicates size of largest flood for that year |
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Term
| 10, 25, 50, 100-year floods |
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Definition
| Probability of floods occurring, Each year 10%, 25%, 50%, 100% chance that flood will occur |
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Term
| Which zone should have greatest building restrictions and why? |
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Definition
| Floods happening in 10-year floodplains zones because flooding is more often to occur |
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Term
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Definition
| Outside of bend where erosion occurs, Symbolized with close contour lines |
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Term
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Definition
| Inside of bend where deposition occurs, Symbolized by dots |
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Term
| How to predict where streams will deposit sediments? |
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Definition
| River naturally builds its bank on point bar, and destroys bank on cut bank shifting river in direction of cut bank over time, RIver becomes more winding |
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Term
| Which side of a stream is steeper and why? |
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Definition
| Cut bank is steeper because sediment has eroded away |
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Term
| Which side of stream is shallower and why? |
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Definition
| Point bar because sediment has gradually built up |
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Term
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Definition
| Storage of water, Actual pore space within sediments, Higher porosity=greater amount of groundwater it can hold |
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Term
| Highest to lowest Porosity Values |
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Definition
| Gravel, Sand, Mixed Sediment |
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Term
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Definition
| Ability to transmit water or fluids, Higher permeability=More easily water can pass through material, Depends on pore spaces & how they are interconnected |
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Term
| Highest to Lowest Porosity Values |
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Definition
| Gravel, Sand, Mixed Sediments |
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Term
| What direction does water flow? |
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Definition
| From high elevation to low elevation |
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
| Impact of the Vadose Zone Media |
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Term
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Definition
| Conductivity of the Aquifer |
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Term
| How does DRASTIC Number relate to likelihood of ground becoming polluted? |
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Definition
| Higher DRASTIC number means more likely to be polluted |
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Term
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Definition
| Collection of sub settings depending on DRASTIC index that affect occurrence & groundwater availability |
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Term
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Definition
| Relative rating system uses combination of weights and ratings to produce quantitive value, higher value-greater pollution potential |
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