The key controls in a db system & hydrographs
-
Upload
geographypods -
Category
Documents
-
view
877 -
download
1
description
Transcript of The key controls in a db system & hydrographs
![Page 1: The key controls in a db system & hydrographs](https://reader036.fdocuments.us/reader036/viewer/2022070304/54d431ea4a795944158b45c4/html5/thumbnails/1.jpg)
Storm Hydrographs
• Aim: To recognise the recordings of a storm hydrograph and to understand its main features and how it can be influenced by h/p characteristics
• Case Study: Pakistan 2010
![Page 2: The key controls in a db system & hydrographs](https://reader036.fdocuments.us/reader036/viewer/2022070304/54d431ea4a795944158b45c4/html5/thumbnails/2.jpg)
A Storm Hyrdograph
![Page 3: The key controls in a db system & hydrographs](https://reader036.fdocuments.us/reader036/viewer/2022070304/54d431ea4a795944158b45c4/html5/thumbnails/3.jpg)
What do we mean by lag time, peak flow and recession/falling limb.
![Page 4: The key controls in a db system & hydrographs](https://reader036.fdocuments.us/reader036/viewer/2022070304/54d431ea4a795944158b45c4/html5/thumbnails/4.jpg)
Pakistan Floods 2010 Watch first 3 mins
![Page 5: The key controls in a db system & hydrographs](https://reader036.fdocuments.us/reader036/viewer/2022070304/54d431ea4a795944158b45c4/html5/thumbnails/5.jpg)
Pakistan 2010 Floods
![Page 6: The key controls in a db system & hydrographs](https://reader036.fdocuments.us/reader036/viewer/2022070304/54d431ea4a795944158b45c4/html5/thumbnails/6.jpg)
![Page 7: The key controls in a db system & hydrographs](https://reader036.fdocuments.us/reader036/viewer/2022070304/54d431ea4a795944158b45c4/html5/thumbnails/7.jpg)
11th August 2009
![Page 8: The key controls in a db system & hydrographs](https://reader036.fdocuments.us/reader036/viewer/2022070304/54d431ea4a795944158b45c4/html5/thumbnails/8.jpg)
11th August 2010
![Page 9: The key controls in a db system & hydrographs](https://reader036.fdocuments.us/reader036/viewer/2022070304/54d431ea4a795944158b45c4/html5/thumbnails/9.jpg)
![Page 10: The key controls in a db system & hydrographs](https://reader036.fdocuments.us/reader036/viewer/2022070304/54d431ea4a795944158b45c4/html5/thumbnails/10.jpg)
![Page 11: The key controls in a db system & hydrographs](https://reader036.fdocuments.us/reader036/viewer/2022070304/54d431ea4a795944158b45c4/html5/thumbnails/11.jpg)
The Key Controls in a DB System
1. Basin size, shape and relief
2. Types of precipitation
3. Temperature
4. Land use
5. Geology
6. Soil Type
7. Drainage Density
8. Tides and storm surges
![Page 12: The key controls in a db system & hydrographs](https://reader036.fdocuments.us/reader036/viewer/2022070304/54d431ea4a795944158b45c4/html5/thumbnails/12.jpg)
Key idea to remember
• The eight controls set out on the previous slide should not be viewed in isolation to one another. It is rare that just one of these control mechanisms would contribute towards a major event in a drainage basin.
• They should therefore be viewed as an interacting set of factors that contribute towards the behaviour of the basin.
![Page 13: The key controls in a db system & hydrographs](https://reader036.fdocuments.us/reader036/viewer/2022070304/54d431ea4a795944158b45c4/html5/thumbnails/13.jpg)
Task
• Use page 62-63 of Waugh – Integrated Approach to make notes on the 8 key DB factors.
• Where possible, try to find an example (photo, graph or quote) to further illustrate the point.