Transcript Diapositivo 1

Introduction
In this work it will be presented:
Some photographs of the Old Alentejo;
The Dam of the Alqueva;
The Current Alentejo.
Old Alentejo
The Old Alentejo had its
landscapes
“badly treated”.
We can see that in the bad
order of the territory.
The fields were,
essentially, cultivated
of corn-field.
Did not exist Intensive cultures.
The first references to the necessity to create this project
dates from 100 years ago.
The project itself is from 1957, being contemporary of the
Plan of Irrigation of the Alentejo. Data that the Guadiana is an
international river, were celebrated the International Covenant
Luso-Spaniard, who attributes to Portugal the hydraulical
exploration of the understood sector enters the confluences of
the river Caima and the riverside of Cuncos.
The first works had been initiated in 1976 and, two years,
had constructed to the cofferdams of sum and ebb tide, the
provisory shunting line tunnel of the water course and all the
infrastructures of support and access.
In 1978 the workmanships had been interrupted, having been
retaken, in 1993, after a phase of new studies.
Finally in May of 1995 the restarted works, after an international public
competition, launched for the Installing Commission of the Alqueva.
In January of 2002 the main body of the barrage was concluded and its
floodgates of deep and way are locked up the 8 of February of the same
year.
Located in full Alentejo, the dam of the Alqueva was installed in
the river Guadiana, downstream of the confluence of the river
It thaws and the sum of the confluence of the river Ardila. The
albufeira presents 1100 km of edges and 83 a total extension of
km, throughout the municipality of Moura, Portel, Mourão,
Reguengos the Monsaraz and Alandroal.
Area of the hidrografic basin - 55000 km²
Annual average of the caudal volume - 2851000 x 1000
m=90,34m³/s
Full caudal- 12000 m³/s
Períod of money return - 1000 years
Croncrete – Vault of double bending
Height above of the ground - 96 m
Quota of the - 154 m
Length of - 458 m
Width of - 7 m
- Rock
Volume of concrete - 687 x 1000
Area flooded to NPA - 250000 x 1000m²
Capacity total - 4150000 x 1000m³
Useful capacity - 3150000 x 1000m³
Level of full storage (NPA) - 152 m
Level of full principle (NMC) - 154,7 m
Minimum level of exploration (Nme) - 135 m
The main objective of the EFMA (Enterprise of
Multiple Ends of the Alqueva, created for the
dam) is mainly the construction of a water
reserve in order to satisfy the necessities of
the region, given the irregularity of the volume
of the Guadiana and the occurrence of periods
of drought in the region. Besides that, it still
intends to guarantee the regular water supply,
keep up with the gradual changes in agriculture,
to reinforce the capacity of energy production,
to create of tourism potentialities, to fight
desertification, to intervene in an organized way
with the environment and the estate and to
promote the regional job offer.
•Bigger amount of water available (irrigated field )
• More fertile soil
•Cattle raising
To increase the search of the products
To create dimension of offers of the products
in the region
To increase the knowledge of the producers on
the products
To increase the capacity technique in the
region
To develop the competitiveness of the
products
Tourism
Production of electric energy
•Alteration of culture, starting to sow itself predominantly oliveiras,
instead of the wheat, rye, barley
•Production of hídrica energy
•Bigger amount of drinking waters
•A natural habitat for diverse animal species
•The seen Alentejo as a tourist place and of leisure
•The Alentejo with enterprise and lucrative chances
With the construction of the Alqueva,
the landscape also got excited .
In the first photograph we can see
a zone that not yet was submerged.
Great part of the territory in return of
the dam was submerged.
With these images already the great
dimension of busy territory for the
water is well visible.
Due to construction of the dam of the
Alqueva, the river Guadiana started to
have little water, therefore great part
is restrained in this.
Current Alentejo
In the Current Alentejo we saw an
improvement in the exploitation
of the territories.
In the territories, mainly, they are
cultivated olivais