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We have calculated the ablation and runoff curves for each of the major watersheds of UIB (Figure 1) to derive the ELA within the respective watersheds for both of the months of July and August. Table 5 provides the results of the calculations. The lower and upper limits of the ELA for a month correspond to the lower and upper limits of the values of αg selected (which are 1:0.0025 m and 1:0.01 m, respectively). From the calculations of the ELA for the months of July and August, we take the averages of the lower and upper limits of the ELA as given in Table 5.

Table 5

Estimated ranges of the ELA for the months of July and August within the individual watersheds of UIB

 ELA July (m)
ELA August (m)
Average ELA (m)
WatershedsLower limitUpper limitLower limitUpper limitLower limitUpper limit
Gilgit 5,264 5,675 5,380 5,740 5,322 5,707 
Hunza 5,280 5,480 5,280 5,480 5,280 5,480 
Shigar 5,080 5,330 5,080 5,330 5,080 5,330 
Shyok 6,080 6,200 6,080 6,200 6,080 6,200 
Kharmong 5,280 5,510 5,310 5,520 5,295 5,515 
Zanskar 5,250 5,500 5,180 5,480 5,215 5,490 
Shingo 5,020 5,170 5,020 5,170 5,020 5,170 
Astore 4,780 5,100 4,900 5,140 4,840 5,120 
 ELA July (m)
ELA August (m)
Average ELA (m)
WatershedsLower limitUpper limitLower limitUpper limitLower limitUpper limit
Gilgit 5,264 5,675 5,380 5,740 5,322 5,707 
Hunza 5,280 5,480 5,280 5,480 5,280 5,480 
Shigar 5,080 5,330 5,080 5,330 5,080 5,330 
Shyok 6,080 6,200 6,080 6,200 6,080 6,200 
Kharmong 5,280 5,510 5,310 5,520 5,295 5,515 
Zanskar 5,250 5,500 5,180 5,480 5,215 5,490 
Shingo 5,020 5,170 5,020 5,170 5,020 5,170 
Astore 4,780 5,100 4,900 5,140 4,840 5,120 

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