Revitalization of Rivers in India Draft Policy - Isha Guru Jaggi Vasudev

Revitalization of Rivers In India
Draft Policy Recommendation
stream network, slope/contour, forest legal boundaries, settlement
locations and village boundaries. The main criterion that will be used to
differentiate the various land uses in the study area in these type groups is
their similarity, such as in the height and extent of forest canopy in the case
of vegetative covers, and the predominance of a paved, impervious surface
devoid of vegetation in the case of commercial and rural residential zones.
The percentage of land use within the proposed area will be calculated and
grouped in each basin which can be determined from the prepared data set
(Map layers). Finally, field validation will be conducted with processed data
base.
3.2. Geology – To understand the geology of the area including rock formations
and types of rock, structural aspects will be studied through field
examinations.
3.3. Soil Study – Physical and chemical characteristics, types of soil, and
depth profile data will be collected from the existing source for further
understanding and analysis.
3.4. Rainfall – Rainfall data will be collected from the existing data source for the
proposed region to understand the rain pattern.
3.5. Streamflow – Flow rate data will be collected for the past few decades to
understand the existing scenario.
3.6. Evapotranspiration (ET) – If the ET data is not available then it will be
calculated from collected rainfall and streamflow, etc. The mass-balance
approach of Giusti (1978) will be used to estimate evapotranspiration
(ET) within the study area. In this approach, ET can be considered to be
the difference between rainfall and runoff (ET = P–RO) where P is the
basin average precipitation and RO is runoff. According to Giusti (1978),
ET increases until a threshold in rainfall is reached, beyond which it
progressively decreases with further increases in rainfall. The rainfall and
streamflow data will be used to estimate evapotranspiration.
3.7. Groundwater – Available groundwater data will be used to understand the
current condition of the basin.
Annexures
291