GEOL 1425 1st Edition Lecture 20Outline of Last Lecture I. About the hydrological cycleII. Flows and reservoirsIII. Groundwater Outline of Current Lecture I. About stream transportII. Stream, valleys, channels, floodplainsIII. Channel patternsIV. Drainage networksCurrent Lecture—Stream Transport 1**at the beginning of next lecture (Thursday), Dr. Hunt will give us an overview of how much to put into studying and preparing for the tests, etc. **I. About stream transporta. Talked about sedimentary basins on margins of continents, mountains being reduced to flat plains, this happens by stream transport—a major transport agent. b. Sometimes is long and slow, sometimes is very fast. Water by itself is not very erosive, but what it carries does the erosive work. In montane areas erodes downwards. In lower areas it erodes flat. II. Stream, valleys, channels, floodplainsa. Low profile valleys aren’t in upland regionsb. Floods carrying major materials can be deposited into low valleys and plainsThese 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.c. Rejuvenation of montane areas due to streamsd. High active energy in high regions. Water continuously eroding downwards. e. Mid regions, less energy and large items are depositedf. Low regions become stream-like and wide flow of waterIII. Channel patternsa. Low water period during summers, higher water in winter somewhat due to meltof winter snowsIV. The stream floodplana. Receding floodwater leaves behind deposits of water as ponds and pools that eventually evaporate, then leaving an accumulation of sedimentary particles behind.V. Drainage networksa. Divide- high part, Drainage basin- low part of very small drainage basins. Several drainage basins can combine to form a large drainage basin and then a river (e.g. Mississippi River). b. Rivers branch of into smaller and smaller branches as they go upc. Sometimes a drainage basin can be really random due to a lack of control—no faulting or weaknesses in the rock for the water to flow
View Full Document
Unlocking...