BVM Engineering college, V.V.Nagar 1

GUJARAT TECHNOLOGICAL UNIVERSITY

BIRLA VISHVAKARMA MAHAVIDYALAYA

Subject : hydrology and water resources engineering

Year : 3rd (5th sem-Civil)

DROUGHT MANAGEMENTCompiled

by:CHAD HARILAL B.

140073106001

Guided by : Dr. J.R.Pitroda Resma mem

Definition of DroughtDrought is a period of below-average

precipitation in a given region, resulting in prolonged shortages in its water supply, whether atmospheric, surface or ground water.

A drought can last for months or years, or may be declared after as few as 15 days.

It can have a substantial impact on the ecosystem and agriculture of the affected region and harm to the local economy.

TYPES

1) Meteorological:- Meteorological drought is brought about when there is a prolonged time with less than average precipitation.

2)Agricultural :-It is drought occurs when there is not enough water available for a particular crop to grow at particular time. it doesn't depend only on the amount of rainfall but also on the correct use of water. it is affected crop production.

3)Hydrological:- drought is brought about when the water reserves available in sources such as aquifers, lakes and reservoirs fall below the statistical average. It is associated with the effects of periods of precipitation shortfall on surface and sub surface water supply rather then with precipitation shortfall.

4) Socioeconomic :- it is associates the supply

and demand of sum economics good or service with element Hydrological, Meteorological, Agricultural.

causesAmount of water vapor in the

atmosphere :-if there is an above average presence of dry, high pressure air system, less moisture is available for produce rain.

Shifting of air mass:-when winds shift air masses and warm, dry, continental air moves over and area as opposed to cooler, moist oceanic air masses , the area suffered a drought.

Human activities:- Deforestation for agriculture Over farming Excessive irrigation construction of

building

Global warming :- overall global warming will result in increased world rainfall along with drought in some areas .

Other causes Cold and warm water ocean currents Mountains

DROUGHT MANAGEMENT

Drought Management System in India

FLOW CHART OF DROUGHT DECLARATION IN INDIA

GOVERNMENT OF INDIA .

MINISTRY OF AGRICULTURE & COORPERATION.

CENTER DROUGHT RELIEF COMMISSIONER. STATE GOVERNMENT .

CHIFE CHIEFSECREPARY.

STATE DROUGHT RELIEF COMMISSIONER. DISTRICT COLLECTOR. TALUKA DEVLOPMENT OFFICE . GRAM PANCHAYAT.

Reported drought events in India over the past 200 years

References

https://en.wikipedia.org/wiki/Drought

Management of drought by Dr. N. Sai Bhaskar Reddy

BVM Engineering college, V.V.Nagar

Thank you…..15