Masjed Soleiman

In this section the project is introduced in form of following items:

• Targets
• History and background
• Location and general layout
• River specifications
• Specifications of catchmnet area
• Dam location
• Features

Targets

• Increasing the hydroelectric energy generation of the country to annually 3700 million kw/hTargets 
• Preparing a winter excursion area and attracting tourists for amusement, visiting dam and water sports
• Job-creating in time of construction and operation
• Providing a part of the network power in peak load
• Regulation of Karun River water

History and background

The preliminary studies about Karun catchmnet area was done by consulting engineer Corporation of Harza about fifty years ago. Feasibility studies of Masjed Soleiman dam was carried out and construction of current dam with the name of Karun 4 was recommended in an area with the name of Godarelandar. After Islamic revolution, Mahab Quads consulting engineers, with cooperation of Akers Corporation of Canada carried out some studies about the dam. Finally during the period of 1981-1986 Mashanir consulting engineers with cooperation of Lamayer Company from Germany completed the studies and proposed the current axis of Masjed Soleiman dam as the final axis.History & background of the project

The construction of water diversion system was started in 1991 and finished at the end of 1994. 19th July of 1995 the river was diverted into diversion tunnels. At the end of fall 1995, with completion of the upstream cofferdam, the construction of the dam was started in a dry area. After this process, equipping the site was started together with complementary studies about quarries. Then excavation and strengthening dam foundation began. The main part of the construction ended in 2000 and dam refilling with water was made possible in December 2000. Construction of hydraulic steel structure began in 1996 and completed according to the plan in 2001. Since fall of 1996 manufacturing of equipments of main powerhouse and switchyard began. After installation of the equipments of four units of the powerhouse, the tentative operation of the units successfully ended in October & February 2002 and July & November 2003.

Civil works of the development project began in the end of 1998 and after completion of excavation activities in October 2003, now concrete placement of water channels and powerhouse cavern has ended. Installation the hydro-mechanical equipment has begun in June 2003 and installation of turbine equipment has also begun in October 2003. It is predicted that tentative operation of the second 1000 megawatts is expected to finish in 2007.

Location and general layout

River specifications

Specifications of catchmnet area

Dam location

Features

• Topography
• Meteorology
• Hydrology
• Flood
• Water quality
• Sedimentation
• Planning the water resources
• Geology
• Seismicity
• Dam reservoir

Topography

This project is located in mountainous area of Zagros with geographical coordinates of average height of 625 meter. Standard deviation of height model of the region is equal to 531 which show high “ups and downs” of the dam structured area and altitudinal parameter increase in direction of north-east.

Meteorology

Average annual temperature near the dam structure is about 25.5˚C. Monthly & annually thermal gradient shows that alternation of temperature is 0.9˚C for each 100 meters. The surrounding meteorology stations are evaporation measuring stations of Lali, Shahid Abbaspour dam, Sousan, Izeh, Godarlandarand barangard and also Masjed Soleiman and Izeh Nisoptic stations. Considering the studies, these stations’ reports are relatively accurate, but there are some statistical problems.

Hydrology

Masjed Soleiman dam has two general middle and upstream region. The middle area is about 2005 square kilometer and the upstream area is about 27548 square kilometer.

Flood

According to discharge studies, the discharge peak for Masjed Soleiman dam in periods of 50, 100, 1000 and 10000 years are equal to 6000, 6800, 9300 and 11400 m3/s. Also PMF discharge is equal to 21700.

Water quality

Masjed Soleiman reservoir ware is generally used for power generation and a little portion of it is transferred to the pumping station of Masjed Soleiman city.

Sedimentation

The sources of Sedimentation entrance to the dam reservoir are Shour and Marghab Rivers, Karun 1 dam and minor waterways between the area of Masjed Soleiman and Karun 1 dams. Totally in the carried out studies the sedimentation volume of Masjed Soleiman reservoir is estimated to be 10 × 4.13 tone/year.

Planning the water resources

There is no data for this issue.

Geology

Masjed Soleiman project is situated in a few hundred meters upstream of Karun River valley entrance. The entrance of this valley consists of layers of “brown to red” stones with gypsum grains, which belong to the Aghajary Sazand and some sandstone and tiny grains of Conglomerate.

Seismicity

Seismicity activity in Zagros region typically consists of small earthquakes at the surface level.

Dam reservoir

Masjed Soleiman dam has a reservoir of 261 million m3 volume in normal level. The useful volume is reported to be 239 million m3. The geological structure in dam site consists of clay, sand and conglomerate layers. Existing clay layers and their slope toward the reservoir has caused the suitable sealing of foundation.

In this section the technical information of the project is presented in form of the following items:

• Dam body

1. Body specifications
2. Reservoir specifications
3. Diversion system
4. Instrumentation
5. Spillway
6. Quarries and their specifications

• Powerhouse

1. General specifications of powerhouse
2. Specifications of powerhouse equipments
3. Specifications of powerhouse building
4. Specifications of powerhouse outlet tunnels
5. Specifications of powerhouse waterways

• Technical specifications of post and switchyard
• Water transfer tunnels

1. Specifications of tunnels
2. Intake structures
3. Outlet structures

• Access roads and bridges
• Complementary operations

Body specifications

Embankment volume of main dam
Type of material	Volume (million m3)
Core	1.963
Filter	0.84
Sand	8.685
A3	3.764
B3	2.67
C3	2.208
D3	0.043

 

Water sealing specifications
Sealing method	Grouting curtain
Total length of grouting tunnels	1100 m
Total length of grouting	44 km
Depth of grouting curtain	45 to 90 m

 

 

Reservoir specifications

Item	Quantity
Volume of reservoir at normal level	261 million m3
Area of reservoir at normal level	7.49 km
Length of dam lake	27 km
Width of dam lake	-
Normal level	372

 

Diversion system

Item		Quantity	Item	Quantity
Location		-	Tunnel diameter	9 m
Numbers of diversion tunnels		2	Total open-cut and underground excavation	1.8 million m3
Length of diversion tunnels		1038 and 1171 m	Discharge volume	3000 m/s for 100-year flood
Cross section	Left tunnel	Circular	Type and height of upstream cofferdam	Rock-fill with clay core integrated to dam body with the height of 96 m
	Right tunnel upstream of bottom outlet	Circular
	Right tunnel downstream of bottom outlet	U shape
Lining type		Concrete with the thickness of 75 cm	Type and height of downstream cofferdam	Rock-fill with clay core with the height of 38 m
Excavation diameter of tunnel		10.5 m

 

Instrumentation

The controlling system and instrumentation tools of Masjed Soleiman powerhouse is designed as non-centralized in four levels of controlling, including local controlling boards, UCB (Unit Controlling Board), CCR (Central Controlling Room) and dispatching center; in a way that the local controlling has the highest priority and this priority decreases from CCR to UCB and dispatching center. The most common operation level is dispatching center and then there are central controlling room, UCB and local centers. These centers are limited to the special testings, repairs and maintaining.  Through controlling system and with the help of created interfaces between controlling system and several equipments, each units can work on the basis of the following models; Line Charging Mode, Synch-Condenser, Generators, Standby Rolling and Standstill.
Synchronic equipments for each unit are installed in controlling board and the possibility of synchronizing is available from CCR, UCB and dispatching centers.
It is possible to control each powerhouse units individually from dispatching center and at the same time a series of units can also be jointly controlled.
The data servers can record long-term events in powerhouse and the operators can have access to this information through their computers.

Spillway

Item		Quantity
Type of spillway		Gated with WES standard crest
Location		Right abutment
Type of gates
Numbers of gates		5 عدد
Width of spillway on crest		13.25 m
Spillway chute	Length	420 m
	Width	72.5 m
Discharge volume		21700 m3/s
Stilling basin	Type	USBR standard type I
	Length	238 m
	Width	72.5 m
Total volume of concrete placement of spillway		540 thousand m3/s

 

Quarries and their specifications

Four zones were considered for this purpose. In the end, among these four zones Simband quarry was selected, because of the good amount of stones and their suitable qualities. The amount of stones in this area has been estimated to be more than 3 millions m3. The distance of this area to the dam site is 8 km along with the existing public road. For concrete, the required sand is taken from quarries near Shushtar and the deposit of excavated sand of Kooshk quarry.

 

General specifications of powerhouse

Item		Quantity
Type of powerhouse		Underground
Location		Right abutment
Capacity		2000 mw
Average annual generation		3700 million kw/h
Turbine type		Francis with vertical axis
Operation level	Minimum critical	+363
	Normal	+369
	Maximum	+372

 

Specifications of powerhouse equipments

Item		Quantity	Item		Quantity
Numbers of turbine	Main	4 units	Numbers of generator	Main	4 units
	Development	4 units		Development	4 units
Power of turbine		254 mw	Type of generators		Sycron
Maximum output	Main	94٪	Output power of each generator		263 mwa
	Development	96.23٪
Height of turbine design		140 m	Nominal voltage of each generator		15.75 kv
Discharge design of each unit		190 m3/s	Rotation speed of generator		187
Turbine manufacturer	Main	Harbin of China and Azarab of Iran	Manufacturer of generator	Main	Elin of Austria and Pars Generator of Iran
	Development	Fiot of Austria and Azarab of Iran		Development	GE of Canada and Pars Generator of Iran

 

Specifications of powerhouse building

1-General specifications of building:

Length	Width	Height
267 m	30 m	49.6 m
Total volume of excavation	316000 m3
Total volume of concrete placement	116000 m3

 

 

3-Transformer cavern:

Length	Width	Height
220 m	14 m	23 m
Total volume of excavation	71500 m3
Total volume of concrete placement	17500 m3

 

Specifications of powerhouse outlet tunnels

In this regard no data exists.

 

Specifications of powerhouse waterways

 

In this regard no data exists.

 

 

 

Technical specifications of post and switchyard

Specifications of switchyard and 400 kv transfer lines
Post voltage	400 kv
Arrangement type of post	1.5 key
Numbers of B	6
Intake numbers	4 lines of 500 mw
Outlet numbers	5 lines
Area of post land	50000 m2
Specifications of 400/132 post
Numbers of transformers	2
Numbers of feeders of transformers	2
Power of each transformer	200 mva
Numbers of outlet feeders	6
Voltage of each outlet feeder	132 kv

 

Specifications of tunnels

Main Phase
Length of water transfer tunnel	1350 m	Numbers of intake penstocks	4
Diameter of intake transfer tunnel	9 m	Numbers of outlet penstocks	4
Diameter of outlet transfer tunnel	11 m	Length of each penstock	50 m
Type of lining	Concrete and metal	Average diameters of penstocks	5.8 m

 

 

 

Development phase
Length of waterway tunnel	1840 m	Length of each penstock	50+72 m
Diameter of intake transfer tunnel	9 m	Average diameters of penstocks	5.8 m
Diameter of outlet transfer tunnel	12 m	Numbers of wave catching containers	1
Type of lining	Concrete and metal	Type of container	Vertical shaft
Numbers of intake penstocks	4	Height of container	49 m
Numbers of outlet penstocks	1	Diameter of container	22.5 m

 

Intake structures

Item	Quantity	Item	Quantity
Numbers of intake	4	Type	Stop-log
Maximum design discharge	190 m3/s	Valve of intake structure	Radial
Design head	29,75 m	Length of valve	8.54 m
Numbers of  valves	2 series of 4	Height of valve	8.54 m

 

Outlet structures

Item	Quantity	Item	Quantity
Numbers of intake	4	Type	Stop-log
Water filling level	+322 m	Length of valve	13.75 m
Design head	22.3 m	Height of valve	11 m
Numbers of  valves	1 series of 4

 

 

Access roads and bridges

 

1- Technical specifications of access roads

 

Name of the road	Average width (m)	Length (km)
Payan road	7.3	21.5
Entrance blvd.	18	1.5

 

2- Technical specifications of the bridges

Name of the bridge	Width (m)	Length (m)	Type of structure
Naser bridge	14	10	Concrete
Stilling basin bridge	72.5	238	Metal

 

3- Technical specifications of access tunnels

Name of tunnel	Length (m)
Access tunnel of  main phase	1300
Access tunnel of development phase	1856

 

Complementary operations

In this regard no data exists.