Table 9: Principal Factor Matrix of Impact on the Environment.

-	Components
Variables	1	2	3
Water pollution	-0.051	0.793	-0.126
Flooding	0.151	0.626	0.023
Bank erosion	0.715	0.053	0.181
Biodiversity loss	0.760	-0.301	-0.093
Health hazard	0.833	0.275	0.058
Other effects	0.323	0.165	-0.126