Allow for the influence area of water level lifting up each other , the whole simulation range includes
(see figure 1)that Jialing River is from junction point to Hualong bridge, 9.33km length, Yangtze River is
from junction point to Jiulongpo, 9.93km length, the downstream is from junction point to Cuntan,
6.74km length. Using six-nodded triangle isoparametric element, the Computational domain is meshed
for 25661 elements and 52676 nodes(see figure 2).