Land use parameter

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(Created page with " The major classification are provided in Table below. *grassland *coniferous forest *decidious forest *mixed forest *agriculture land *shurbland *bareland/per.snow *waterbodie...")
 
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[[pt:Parâmetro_do_uso_da_terra]]
The major classification are provided in Table below.  
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The major classification required for the J2000 hydrological model is provided in the Table below.  
  
 
*grassland
 
*grassland
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*mixed forest
 
*mixed forest
 
*agriculture land
 
*agriculture land
*shurbland
+
*shrubland
 
*bareland/per.snow
 
*bareland/per.snow
 
*waterbodies
 
*waterbodies
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*bogs and wetlands
 
*bogs and wetlands
  
The land-use classes with similar features can be merged together which behaves similarly to hydrological dynamics. In case of few classes are available in the data (such as only Forest class), the user can exclude other sub-classes such as (deciduous or coniferous).
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The land-use classes with similar features (such as agriculture and its rainfed  and irrigated varieties) can be merged, which behaves similarly to hydrological dynamics. In case of few classes be available in the data (such as only Forest class), you can exclude other sub-classes such as deciduous or coniferous.
  
The J2000 hydrological model requires information of land-use and land-cover types as provided in Table below. Some information might differ in ecological zones such as LAI. However, some information are primarily similar in every parts of the world (such as root depth). The parameter values which are different in different ecological zones (such as LAI in Table xx) has to be adjusted by users based on the climatic and ecological conditions of the study area. For example, the LAI value is different in tropical (India) and temperate (Germany) region. In Germany the value of LAI is low during winter season as most of the leaves fall due to low temperature. However, in the tropical reason, few leaves are left in trees during winter season. However, certain information such as root depth remains same for each vegetation type for different zones. Users are free to change these values based on direct field measurement or literature. The detailed information about the land-use parameters and the application in different modules are provided in Table below.
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The J2000 hydrological model requires information of each land-cover type as provided in the table below. Some information might differ in ecological zones such as LAI. However, some information is primarily similar in every part of the world (such as root depth). You have to adjust the parameter values, which differ in different ecological zones based on the climatic and ecological conditions of the study area. For example, the LAI value is different in tropical (India) and temperate (Germany) regions. In Germany, the value of LAI is low during winter as most of the leaves fall due to low temperature, whereas in tropical regions, few leaves fall off trees during the cold season. However, certain information, such as root depth, remains the same for each vegetation type for different zones. You are free to change these values based on direct field measurement or literature. The detailed information about the land-use parameters and their application in different modules is provided in the table below.
  
*landuse.par
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----
  
 
{| style="text-align:left;"
 
{| style="text-align:left;"
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|RSC0_12 || minimum surface resistance for water-saturated soil in December
 
|RSC0_12 || minimum surface resistance for water-saturated soil in December
 
|-
 
|-
|LAI_d1 || leaf area index (LAI) at the beginning of the vegetation period  
+
|LAI_d1 || leaf area index (LAI) at the beginning of the vegetation period (Jan-Mar)
 
|-
 
|-
 
|...
 
|...
 
|-
 
|-
|LAI_d4 || leaf area index (LAI) at the end of the vegetation period  
+
|LAI_d4 || leaf area index (LAI) at the end of the vegetation period (Oct-Dec)
 
|-
 
|-
|effHeight_d1 || effective vegetation height at the beginning of the vegetation period  
+
|effHeight_d1 || effective vegetation height at the beginning of the vegetation period (Jan-Mar)
 
|-
 
|-
 
|...
 
|...
 
|-
 
|-
|effHeight_d4 || effective vegetation height at the end of the vegetation period  
+
|effHeight_d4 || effective vegetation height at the end of the vegetation period (Oct-Dec)
 
|-
 
|-
 
|rootDepth || root depth
 
|rootDepth || root depth
 
|-
 
|-
|sealedGrade || sealed grade
+
|sealedGrade || sealed grade of surface
 
|}
 
|}
  
The relevancies of these variables in calculation of differnt water cycle components are provided in the following documents.
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----
 +
 
 +
The information of these variables is used to calculate different hydrological components during the modelling application. The LAI is used for Interception Module to calculate interception storage. Similarly, RSC0_1...12, effHeight, and root depth is required for estimation of evapotranspiration and soil module. The relevancies of these variables in calculation of different water cycle components are provided in the following documents.
  
 
Krause 2001, Krause 2010, Nepal 2012
 
Krause 2001, Krause 2010, Nepal 2012
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land-use parameter file (Dudh Kosi, Nepal, Himalaya)
 
land-use parameter file (Dudh Kosi, Nepal, Himalaya)
  
Users have to prepare the land-use file in raster format with certain resolution. The resolution depends upon a catchment to be modelled. If the catchment is small (600 km2), the resolution between 30-90 is suitable depending upon the resolution of the available dataset. Similarly, for meso-scale catchment (4000 km2), resolution between 250-500 m is suitable. The resolution of the dataset is important for deriving the number of HRUs.
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The land-cover map has to be prepared in a raster format with certain resolution as discussed earlier.

Latest revision as of 20:36, 20 November 2012

The major classification required for the J2000 hydrological model is provided in the Table below.

  • grassland
  • coniferous forest
  • decidious forest
  • mixed forest
  • agriculture land
  • shrubland
  • bareland/per.snow
  • waterbodies
  • rockyMountains
  • glaciers
  • urban, densely
  • settlement, loosely
  • meadows and pastures
  • bogs and wetlands

The land-use classes with similar features (such as agriculture and its rainfed and irrigated varieties) can be merged, which behaves similarly to hydrological dynamics. In case of few classes be available in the data (such as only Forest class), you can exclude other sub-classes such as deciduous or coniferous.

The J2000 hydrological model requires information of each land-cover type as provided in the table below. Some information might differ in ecological zones such as LAI. However, some information is primarily similar in every part of the world (such as root depth). You have to adjust the parameter values, which differ in different ecological zones based on the climatic and ecological conditions of the study area. For example, the LAI value is different in tropical (India) and temperate (Germany) regions. In Germany, the value of LAI is low during winter as most of the leaves fall due to low temperature, whereas in tropical regions, few leaves fall off trees during the cold season. However, certain information, such as root depth, remains the same for each vegetation type for different zones. You are free to change these values based on direct field measurement or literature. The detailed information about the land-use parameters and their application in different modules is provided in the table below.



parameter description
LID land use ID
albedo albedo in %
RSC0_1 minimum surface resistance for water-saturated soil in January
...
RSC0_12 minimum surface resistance for water-saturated soil in December
LAI_d1 leaf area index (LAI) at the beginning of the vegetation period (Jan-Mar)
...
LAI_d4 leaf area index (LAI) at the end of the vegetation period (Oct-Dec)
effHeight_d1 effective vegetation height at the beginning of the vegetation period (Jan-Mar)
...
effHeight_d4 effective vegetation height at the end of the vegetation period (Oct-Dec)
rootDepth root depth
sealedGrade sealed grade of surface

The information of these variables is used to calculate different hydrological components during the modelling application. The LAI is used for Interception Module to calculate interception storage. Similarly, RSC0_1...12, effHeight, and root depth is required for estimation of evapotranspiration and soil module. The relevancies of these variables in calculation of different water cycle components are provided in the following documents.

Krause 2001, Krause 2010, Nepal 2012

The land-use parameter file of two regions are provided herewith, as an example land-use parameter file (Thuringia region, Germany) land-use parameter file (Dudh Kosi, Nepal, Himalaya)

The land-cover map has to be prepared in a raster format with certain resolution as discussed earlier.

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