TNAU Watershed

Hii sir, I wants to get the Information About the Water Shed Management Of the Tamil Nadu Agriculture University ?

[sumit]

Watershed is defined as a geohydrological unit draining to a common point by a system of drains. All lands on earth are part of one watershed or other. Watershed is thus the land and water area, which contributes runoff to a common point.


Objectives

The different objectives of watershed management programmes are:
1. To control damaging runoff and degradation and thereby conservation of soil and water.
2. To manage and utilize the runoff water for useful purpose.
3. To protect, conserve and improve the land of watershed for more efficient and
sustained production.
4. To protect and enhance the water resource originating in the watershed.
5. To check soil erosion and to reduce the effect of sediment yield on the watershed.



TYPES OF WATERSHED

Watersheds is classified depending upon the size, drainage, shape and land use pattern.

Macro watershed (> 50,000 Hect)
Sub-watershed (10,000 to 50,000 Hect)
Milli-watershed (1000 to10000 Hect)
Micro watershed (100 to 1000 Hect)
Mini watershed (1-100 Hect)



Factors affecting Watershed Management

a) Watershed characters
i) Size and shape
ii) Topography
iii) Soils
iv) Relief

b) Climatic characteristic
i. Precipitation
ii. Amount and intensity of rainfall

c) Watershed operation

d) Land use pattern
i. Vegetative cover
ii. Density

e) Social status of inhability
f) Water resource and their capabilities.


COST
Approximate cost for laying beds & furrows is Rs.1800 / ha.