R. Rajinikanth and T. V. Ramachandra
Energy & Wetlands Research Group, Center for Ecological Sciences, Indian Institute of Science, Bangalore

ESTIMATE CUMULATIVE IMPACT :

There are two general categories of cumulative impact predictions:

1. Qualitative methods.

2. Quantitative methods.
• Empirical equations and statistical correlations.
• Physical process models of the hydrologic system.

Qualitative methods rely heavily on the experience and minimize the need for numerical calculations. Qualitative Results are more general in content and require less detailed information than quantitative methods and hence followed in this cumulative impact study. On the other hand, quantitative methods include a variety of numerical analyses, requiring large amounts of data. In some cases, long-term monitoring is the only way to determine the accuracy of Cumulative Hydrological Impact Assessment (CHIA).