Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some...
-
Upload
margaret-jones -
Category
Documents
-
view
216 -
download
0
Transcript of Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some...
![Page 1: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/1.jpg)
Watershed analysis in Guatemala
Including collected and generated data for
Guatemala as well as some basic regional
statistics calculated for the 40 major watersheds.
Maps prepared by the
Spatial Information and Analysis Group, DECRG, World Bank
September 2001Data sources, too numerous to mention…..sorry!
![Page 2: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/2.jpg)
Municipios
Colours represent departments, municipal boundaries shaded in gray.
![Page 3: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/3.jpg)
40 Major Watersheds
Rio PazWatershed
![Page 4: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/4.jpg)
LandSat ETM images
Rio PazWatershed
![Page 5: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/5.jpg)
Elevation
![Page 6: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/6.jpg)
Terrain Typology
Plains - Greens
Lowlands - Yellows
Hills - Red
Mountains - Grey
High Mountains - White
![Page 7: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/7.jpg)
Land Cover
Forests - Green
Agriculture - Light Yellow
Water - Blue
Other - Pink
Urban - Red
![Page 8: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/8.jpg)
Population Density
![Page 9: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/9.jpg)
Poverty Rate (General)
Low - Green
Medium - Yellow
High - Orange
Critical - Red
![Page 10: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/10.jpg)
Poverty (General)
Population per municipio classified as being poor
![Page 11: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/11.jpg)
Poverty Rate (Extreme)
Low - Green
Medium - Yellow
High - Orange
Critical - Red
![Page 12: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/12.jpg)
Poverty (Extreme)
Population per municipio classified as being extremely poor
![Page 13: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/13.jpg)
Forest / Agri. on Slopes
Forests - Green
Agriculture - Orange
![Page 14: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/14.jpg)
Defining upper watershed areas
5 example methods
1) Use an elevation cut off across the region
2) Split each watershed into 3 based on elevation
3) Derive 3 terrain types (Meybeck) across the region
4) Use a flow length cut off across the region
5) Split each watershed into 3 based on flow length
![Page 15: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/15.jpg)
1) Elevation - Region
Low - Green
Mid - Yellow
High - Grey
![Page 16: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/16.jpg)
2) Elevation - By shed
Low - Green
Mid - Yellow
High - Grey
![Page 17: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/17.jpg)
3) Terrain - Region
Low - Green
Mid - Yellow
High - Grey
![Page 18: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/18.jpg)
4) Flowlength - Region
Low - Green
Mid - Yellow
High - Grey
![Page 19: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/19.jpg)
5) Flowlength - By shed
Low - Green
Mid - Yellow
High - Grey
![Page 20: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/20.jpg)
Comparing the 5 examplesHow much land is in each region?
% area in each region
0%
10%
20%
30%
40%
50%
60%
70%
Low Mid High
Elev-Region
Elev-Shed
Terrain-Region
Flow-Region
Flow-Shed
![Page 21: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/21.jpg)
Comparing the 5 examplesHow many people are in each region?
Population in each region
-
1,000,000
2,000,000
3,000,000
4,000,000
5,000,000
6,000,000
7,000,000
8,000,000
9,000,000
Low Mid High
Elev-Region
Elev-Shed
Terrain-Region
Flow-Region
Flow-Shed
![Page 22: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/22.jpg)
Comparing the 5 examplesHow many poor are in each region?
Poor (General) in each region
-
500,000
1,000,000
1,500,000
2,000,000
2,500,000
3,000,000
3,500,000
4,000,000
4,500,000
Low Mid High
Elev-Region
Elev-Shed
Terrain-Region
Flow-Region
Flow-Shed
![Page 23: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/23.jpg)
Comparing the 5 examplesHow much forest is in each region?
km2 of forest per region
-
5,000
10,000
15,000
20,000
25,000
30,000
Low Mid High
Elev-Region
Elev-Shed
Terrain-Region
Flow-Region
Flow-Shed
![Page 24: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/24.jpg)
Defining upper watershed areas
There is a lot of variation across the 5 methods
methods 2 and 5 (that split each watershed into 3) consistently give high values in the high region,
methods 1 and 4 consistently give low values in the high regions
method 3 consistently gives values that lie in between
Taking method 3 as an example….
![Page 25: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/25.jpg)
Class Area (km2) Agriculture (km2) Forest (km2) Low 62,175 (57%) 30,668 (58%) 27,438 (57%)Mid 16,958 (16%) 9,416 (18%) 5,830 (12%)High 29,297 (27%) 12,698 (24%) 15,128 (31%)Total 108,429 52,781 48,395
Defining High / Mid / Low landsUsing Method 3: Terrain Typologies (Meybeck et al. 2001)
Class Population (2000) Poverty (General) Poverty (Extreme)Low 2,498,093 (22%) 1,552,135 (25%) 542,990 (21%) Mid 3,197,987 (28%) 1,187,251 (19%) 430,058 (17%) High 5,694,926 (50%) 3,494,186 (56%) 1,621,909 (63%)Tot 11,391,006 6,233,572 2,594,956
Population estimated for year 2000 per municipality, (MAGA / BID)
Poverty rates per municipality from official Guatemala poverty map (SEGEPLAN / World Bank)
![Page 26: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/26.jpg)
Selecting watersheds to analyse
We could remove a certain number of watersheds by imposing criteria such as
We are only interested in watersheds that have > 20% of there area classified as ‘high’. Taking method 3 as an example, this would remove all low lying watersheds
![Page 27: Watershed analysis in Guatemala Including collected and generated data for Guatemala as well as some basic regional statistics calculated for the 40 major.](https://reader035.fdocuments.net/reader035/viewer/2022062515/56649d1a5503460f949ef82f/html5/thumbnails/27.jpg)
Selected Watersheds
Selected watersheds shaded in yellow