Question

Collect data of major river system in india on the basis of length from its origin point to the end point plz

Answer 1

Yamuna canal:  247  BOD          Yamuna  near Delhi:  70          Betwa:   58The above are the worst affected.  Near cities and major towns the rivers are badly affected.  In rural areas they are better.BOD levels of 8 mg/L  or less is acceptable... below 2 mg/L is good water.   Ganga :   at Rishikesh 1.5  mg  Oxygen/L.                   at  kanpur : 5 mg/LBrahmaputra:    At gauhati  - very high.      at other locations  : 2 mg /L  or less
Tapi :  2 mg/L  in some areas.    in cities and towns,  about 13 mg/L   BODNarmada  : less than 2.5 mg/L  BODMahanadi  :   less than  1 mg O / Litre   to   4  in cities or chattisgarhKrishna:   1 to 3   in many areas...    10 in many cities/towns....     Around Pune: 28 mg/LCauvery :    generally from 1 mg/L  to  3 mg/LGanga :  4 - 8  mg / liter  BODGodavari :  5 BODVitharini (Bitarni) :  2 mg/lNarmada : 2 mg/lMahi : 2.5 mg//l