Multi- purpose projects and large dams have come under great scrutiny -
(i) Adverse effect on the fertility of the soil : Due to the construction of dams, there are no annual floods in the river.
(ii) Adverse impact on aquatic life: Due to the construction of dams on the rivers, the fish in the downstream area do not get sufficient nutrient material.
(iii) Displacement of local communities : The building of large dams results in displacement of local communities.
(iv) Change in the cropping pattern : The multipurpose projects are responsible for providing assured means of irrigation to farmers.