2. Density of Population, (DP) number of oustees per surface, specificly square Kilometers. The largest known population density affected by hydro developments are : Marsayangdi, Nepal with 5,000 O/Km.Sq., Tehri,India with 2,500 O/Kq, Ohon, China [1,560 O/Kq] and Three Gorges with 1,182 O/Kq.
3. Land Use Ratio (LUR) which is expressed by the ratio of Power Generated and surface of land covered by reservoirs with great variations from one (or offten less-which may indicate a non efficient use of land to larger than 100 MW per Kilometer square). For a more detailed classification please refeer to page "LUR".
The Efficiency (E) and the Density of Population ( DP) affected by hydro are associated directly to one of more complex environmental issue, land lost to the reservoirs, estimated as of global significance, 3.35%-2.4% [1] of the total land surface. Both elements, DP and E, could be correlated to Land Use Ratio (LUR); the correlations provide support for classification of three environmental concerns [EP: Environmental Parameters] associated with new impoundments [Table 1]
The background data of the classification, refers on elements from 242 hydro developments which include a number of 8.8 Millions oustees, 217,000 MW [177 power plants] and 100,000 KmSq .