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Paper Information

Journal:   IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH   SUMMER 2006 , Volume 13 , Number 2 (23); Page(s) 127 To 138.
 
Paper: 

ESTIMATING RANGELANDS YIELD USING REMOTE SENSING DATA (CASE STUDY: DAMAVAND REGION OF IRAN)

 
 
Author(s):  MIRAKHOURLOU KH., HOSSEINI S.Z.A.A.
 
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Abstract: 

Estimating rangelands' production is one of the range management tools. This requires detailed information about the present available forage of the rangelands. The assessment of the parameters is difficult and cost-intensive using clipping method. Therefore, new estimating methods are required. We estimated available forage using remote sensing data in the production model that it extracted from ecological parameters and remote sensing data.
For quantifying evaluation of vegetation cover stratified random sampling and transect sampling methods were selected. Plot size calculated from "minimal area and species curve" method. Overall, 28 transects (50m) one transect in each site that contain 280(1m2) sample plots were measured.
Modeling performed using NDVI index, animal density and effective ecological factors (altitude, slope, aspect, precipitation, temperature and evaporation) on rangelands' yield. After analyzing of ecological factors of Damavand region, some ineffective factors omitted.
Finally three factors namely slope, precipitation and NDVI index were entered in the model for calculating the available forage in the study area. The calculated amount of average standard predicts value of forage model is 38% and its standard deviation value is 97%. They show that the validation of model for predicting of forage is fairly acceptable.

 
Keyword(s): DAMAVAND, ECOLOGICAL FACTORS, NDVI, RANGELANDS, REMOTE SENSING AND YIELD
 
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