76
Samastipur and Begusarai. Its outfalls into the Ganga near Khagaria. The total catchment area is
12021 sq.Km, out of which 9601 sq.Km lies in Bihar and rest in Nepal. There is no major or medium project over the Burhi Gandak river system.
SALIENT FEATURES OF THE BURHI GANDAK BASIN - 1. Total Drainage Area
12021 Sq.Km
2. Drainage Area in Bihar
9601 Sq.Km
3.
Population in Bihar 83.01 Lakh
4. Water resources
4040 MCM
5. Average annual rainfall
1283 mm
6.
Total length of main river 320 Km
7. Cropped area in Bihar
7600 Sq.Km
8. Tributaries - Masan(L), Balor(L), Pandai(L), Sikta(L), Tilawe(L), Tiur(L), Dhanauti(R), Kohra(R),
Danda(R), Table. 9
– Salient Features of Burhi Gandak
LAG TIME ANALYSIS IN BURHI GANDAK: - Water level curves shows that the lagging time between
different sites areas follows S.No Between LAG Time 1.
Lalbeghiaghat and Sikanderpur
36 HOURS
2.
Sikanderpur and Samastipur-
16 HOURS
3.
Samastipur and Rosera-
16 HOURS
4.
Rosera and Khagaria-
24 HOURS Table. 10
–
Lag Time in Burhi Gandak 
