Term
| On which planets and moon do we see evidence for hydrologic process? |
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Definition
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Term
| Which hydrologic process creates the most signficant landforms (hills and Valleys) on earth? |
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Definition
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Term
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Definition
| Surface removal and transport of rocks and soils by following water. |
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Term
| About what percentage or fraction of the public water supply is derved from rivers? |
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Definition
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Term
| Define a tributary within a river system. |
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Definition
| A stream or smaller river that joins a larger river. |
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Term
| Under what conditions can a large river also be classified as a tributary futher downstream. |
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Definition
| If it joins an even larger river |
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Term
| compare the number of tributaries upstream verses downstream of a river system? |
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Definition
| The number of tributaries decreases downstream. |
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Term
| Compare the tributary lengths upstream verses downstream in a river system. |
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Definition
| The length increases downstream |
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Term
| compare the widths of river channels as you move downstream. |
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Definition
| River channels are wider and deeper as you move downstream. |
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Term
| Describe the distribution of water runoff (from rainfall) within one drainage basin |
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Definition
| any water that falls within a certain drainage basin is confined to that river system or drainage basin |
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Term
| How often does water from one river drainage basin flow over into another basin? |
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Definition
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Term
| Describe a continental divide and what happens to the rainfall on one side of this divide. |
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Definition
| the main divide of any continent that seprates rivers that empty into different ocean basins. One side if rained on goes to a river basin and the other if it rains on that side. |
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Term
| Approximately where is the US continental divide located? |
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Definition
along the crest of the Rocky mountains
(from canada, to mexico and the US.) |
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Term
| Besides Earth, where can we find examples of dendritic drainage patterns. |
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Definition
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Term
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Definition
| loose soil and rock on top of solid rock |
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Term
| How does river "down cutting" during floods may change the river channel? |
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Definition
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Term
| What is an incised channel? what forms |
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Definition
| River channel cut into rock (canyons) |
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Term
| Describe a river pothole and how it is formed. |
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Definition
| a hole formed in a stream bed by swirling and abrasion |
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Term
| Describe the geologic process that can cause the edge of the Niagara Falls to migrate upstream? |
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Definition
| eroding and down cutting waterfall ledges cause rocky ledges to collapse |
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Term
| Explain the process of river Piracy. |
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Definition
| The division of one river into another/ river takes over another river |
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Term
| Name a texas river whoose channel has been lengthened by river piracy. |
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Definition
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Term
| Describe erosion and deposition in a transporting subsystem |
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Definition
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Term
| What is a river's sediment load? |
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Definition
| Earth material transported by river |
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Term
| where within the body of a river would you find the suspended load vs. the bed load |
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Definition
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Term
| what are dissolved loads? |
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Definition
| dissolved materials(blackish) |
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Term
| How might dams create problems for a river delta? |
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Definition
| snail disease, no nutrients, fish die |
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Term
| Describe and identify from a picture an alluvial fan. |
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Definition
| accumilation of sediment in a dry basin. |
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Term
| Describe the relationship between alluvial valleys and stream terraces. |
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Definition
| Stream terraces are from alluvial valleys |
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Term
| Describe what is happening to the river sediment load at a delta. |
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Definition
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Term
| What is the name of the classification type for the mississippi river delta? |
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Definition
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Term
| What is river avulsion and how could this affect a city like New Orleans? |
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Definition
| shift in the main course of a river to form a new delta; river can change course and flood city |
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Term
| Compare the location of channel-mouth bars to prodelta muds. |
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Definition
| channel mouth bars are on top of muds |
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Term
| Why do deltas need a constant flow of sediments? |
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Definition
| It is always sinking because of compaction of overlaying muds. |
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Term
| What causes flash floods and why are they so dangerous? |
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Definition
| Local large downburst of rain; these floods can wash cars and people downstream |
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Term
| Describe the ownership of streambeds wider than 30 feet in texas. |
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Definition
| it is public property and you pay tax |
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Term
| what is the TX law with regards to driving within stream and river beds? |
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Definition
no driving off road vehicles in water
minimum 2,000 dollar fine |
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Term
| Name the thre larges rivers associated with the Nueces Drainage Basin. |
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Definition
| Frio river, Atacosta river, Nueces river |
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Term
| Name the three river reservoirs that provide water for C.C. |
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Definition
| Choke Canyon Lake, Lake C.C., Lake Texana |
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Term
| What is the purpose of a salt water barrier dam? |
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Definition
| Prevents high tides from entering fresh water supply. |
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