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Chapter 13
Feasibility of Using Desalination
for Irrigation in the Souss Massa Region
in the South of Morocco
Abdelaziz Hirich, Redouane Choukr-Allah, Abdellatif Rami,
and Mohamed El-Otmani
Abstract The region of Souss Massa in the south of Morocco is considered the
most productive in terms of horticultural products especially destined for export.
The part of the region in exportation of fruit and vegetable is about 90 % at national
level. A greenhouse cropping system is the most common with more than 15,000 ha
of crops grown in greenhouses. However, this region suffers from a serious problem
of water scarcity, where the annual rainfall does not exceed 200 mm, and the water
deficit is more than 260 Mm
3
. In addition to this, agriculture in this region
consumes about 90 % of the water resources. Over-pumping of groundwater is
among the practices aggravating the situation by lowering the water table and
consequently increasing pumping costs and groundwater salinisation due to sea
water intrusion, especially in the coastal areas. Using desalination of sea water for
irrigation of rentable crops as tomato and berries and other vegetables crops could
be a judicious solution to continue producing horticultural products and saving
water.
Pumping cost in Souss Massa region is about US$0.3, and the average desali-
nation cost is equal to US$0.5 with a little change depending on desalination
A. Hirich (*)
International Center for Biosaline Agriculture, P.O. Box 14660, Dubai, United Arab Emirates
Complex of Horticulture, Hassan II Institute of Agronomy and Veterinary Medicine,
Agadir, Morocco
e-mail: hirich_aziz@yahoo.fr
R. Choukr-Allah
Complex of Horticulture, Hassan II Institute of Agronomy and Veterinary Medicine,
Agadir, Morocco
e-mail: redouane53@yahoo.fr
A. Rami
Faculty of Science, University IbnZohr, Agadir, Morocco
e-mail: rami.abdel.horti@gmail.com
M. El-Otmani
International Center for Biosaline Agriculture, P.O. Box 14660, Dubai, United Arab Emirates
e-mail: elotmani.mohamed@gmail.com
©Springer International Publishing Switzerland 2015
M. Baawain et al. (eds.), Recent Progress in Desalination, Environmental
and Marine Outfall Systems, DOI 10.1007/978-3-319-19123-2_13
189
technology. A study has been conducted surveying about 847 farmers representing
farms of a cropping area of 12,770 ha, in order to find out their views regarding a
desalination project for irrigation. 92 % of surveyed farmers accepted this project
with a water demand equal to 32 Mm
3
, 61 % of them accepted to participate in the
project investment. 42 % of the farmers agreed to pay US$0.59–0.83 for 1 m
3
of
desalinated water. 15 % and 4 % accepted to pay US$0.95 and US$1.18 respec-
tively for 1 m
3
of desalinated water.
This survey indicates that there is a great potential of using desalination for
irrigation of rentable crops in the Souss Massa region. Farmers are aware of the
water scarcity problem and they accept the use of desalinated water for irrigation.
Furthermore, the progress in desalination technology will make the price of desa-
linated less costly in the future.
Keywords Water price • Greenhouse • Tomato • Pumping
13.1 Introduction
With worldwide concern about water scarcity, agriculture is under pressure to
improve water management and explore available options to match supply and
demand (FAO 2004). Morocco is a nation heavily dependent on agriculture, which
is responsible for 19 % of the country’s gross domestic product (GDP) (Addison
et al. 2012). The agricultural production in Morocco, as in most Mediterranean
countries, suffers from water scarcity, enhanced by increasing demand and climate
change impacts (Schilling et al. 2012).
Morocco has currently implemented several strategies to cope with water scar-
city, such as the National Green Plan which is a big project launched by the
government to improve agricultural production and the livelihood of famers. The
development of the agricultural sector has allowed the Souss Massa region to play
an important role in the socio-economic development of the kingdom. However,
this situation is accompanied by a significant depletion of groundwater reserves.
Indeed, the increased demand for irrigation water and the reduction in renewable
water resources due to a succession of drought years are currently the major
constraints in the management of groundwater resources which are considered to
be the main source to satisfy water requirements (ABHSM 2008). This situation
calls for speedy intervention by both the public and private sectors to find a
permanent solution as well as an alternative water resource. Among those resources
which have a big potential in the Souss Massa region are wastewater and desali-
nated sea water. The latter could be a very judicious choice as the region is close to
sea, but desalination costs include investment, operation and maintenance all of
which vary according to the type of desalination technology used.
In this paper, the water resources situation and the horticultural production in the
Souss region are highlighted. A survey about the acceptability of farmers to use
desalinated water is presented with a general view about the desalination plant
project which will be implemented in the coming years.
190 A. Hirich et al.
13.2 Water Resources Situation in the Souss Massa Region
13.2.1 Groundwater
The Souss Massa region is characterized by an arid climate with low precipitations
(<200 mm/year). The region has two important aquifer systems, the Souss and the
Chtouka aquifer which have a surface equal to 4150 and 940 km
2
, respectively
(Fig. 13.1).
A survey was carried out by the Agency of the Hydraulic Basin of Souss Mass
(ABHSM), the Office of Agricultural Development of Souss Massa (ORMVASM),
National Office of Potable Water (ONEP) and Associations of Water Users
(AUEA). The results obtained indicated that the water withdrawal in the region
was equal to 738 Mm
3
of which 5 % is used for drinking and industrial water and
95 % for irrigation as shown in Table 13.1 (ABHSM 2005).
13.2.2 Surface Water
The large hydraulic structure built in the Souss Massa basin allowed for a water
storage of 330 Mm
3
/year to irrigate more than 50,000 ha, 12 Mm
3
for drinking
water and 162 Mm
3
for the artificial recharge of aquifers. Table 13.2 presents the
existing dams, their capacity and use objectives in the Souss Massa region
(MEMEE 2014).
Fig. 13.1 Aquifers map of Souss Massa Region
13 Feasibility of Using Desalination for Irrigation in the Souss Massa Region... 191
13.3 Constraints Related to Water Resources Management
13.3.1 Drought
The annual rainfall is very variable and precipitation in a humid year sometimes can
reach 3 times that of an average year and up to 15 times of a dry year. This
irregularity is illustrated in Fig. 13.2, showing that the region was subjected to
four drought periods and only one humid period (ABHSM 2005).
13.3.2 Overexploitation of Groundwater Resources
The reduction in the piezometric level of the water table of the Souss and Chtouka
aquifers due to over-pumping and drought exhibited a decrease of water deficit
varying from 100 to 370 Mm
3
/year for the Souss aquifer and 60 Mm
3
for the
Chtouka aquifer. Figure 13.3 shows the water balance for both aquifers (MEMEE
2014).
According to ABHSM 2005, the piezometric level analysis in the Souss aquifer
between 1968 and 2003 shows a reduction in water table level of about 15 m in the
Souss upstream, more than 30 m in the middle Souss and 20 m in the Souss
Table 13.1 Water withdrawal in the Souss and Chtouka aquifers
Aquifer
Irrigation Drinking water
Number
of farms
Number of
water
sources
Water
withdrawal
(Mm
3
/year)
Number
of
entities
Number of
water
sources
Water
withdrawal
(Mm
3
/year)
Souss 7034 8597 608 513 545 28.7
Chtouka 2482 2758 85 221 244 7
Total 9516 11,355 693 734 789 35.7
Table 13.2 Existing hydraulic structures
Dam Setup year Capacity (Mm
3
) Water use
Youssed Ben Tachfine 1972 304 Irrigation, drinking water
Abdelmoumen 1981 214 Irrigation, drinking water, protection
Dkhila 1986 0.7 Compensation
Aoulouz 1991 108 Irrigation, protection
Imin El Kheng 1993 11 Irrigation
MokhtarSoussi 2001 50 Irrigation
MoulayAbdellah 2002 110 Drinking water
AhlSouss 2004 5 Irrigation, drinking water
Total 800
192 A. Hirich et al.
Fig. 13.2 Variation of precipitation in the Souss Massa region
Fig. 13.3 Water balance of Souss and Chtouka aquifers
13 Feasibility of Using Desalination for Irrigation in the Souss Massa Region... 193
downstream, while in the Chtouka aquifer, the piezometric level was reduced by
more than 20 m (Fig. 13.4).
13.4 Horticultural Production in the Souss Massa Region
According to the Ministry of Agriculture and Fisheries, the production of the
agricultural sector should experience an increase from 11,838 Million DH in
2010–17,669 Million DH in 2020. The created working days increased from
30,804 working days in 2010 to a predicted 36,845 working days in 2020.
Table 13.3 shows the agricultural production of the Souss Massa region as a
proportion of national agricultural production, indicating that the region produces
77 % of the country’s vegetables and 40 % of its citrus fruit (MAPM 2014). Those
crops require a great amount of water. However, the available water resources
cannot sustain increased development in the agricultural sector. Thus, the need for
new water resources has become a priority for all agricultural producers and
authorities, as well as for the water authorities.
13.5 Cost of Water Pumping
The direct annual cost of water pumping varies from 11,000 to 27,000 DH/ha (US
$1326–US$3256/ha) depending on the energy used (electric or thermic). These
costs include:
• Energy which varies from 8000 to 22,000 DH/ha (US$964–US$2653/ha)
depending on thermic or electric energy as well as aquifer depth.
• Well-digging represents on average of 21,000 DH (US$2533) per well, that is
1500–3000 DH/ha (US$181–US$362/ha) at an average of one well per 7 to
14 ha.
• Pump maintenance, which is important in the case of thermic pumps, varies from
20,000 to 30,000 DH/well/year (US$2412–US$3618/well/year) and 1500 to
2000 DH/ha (US$181–US$.241/ha).
For an average water consumption of 12,000 m
3
/year. The total cost of 1 m
3
varies between 0.9 DH (0,11 US$) and 2.25 DH (0.27 US$).
In some farms in the Chtouka zone, the pumping cost exceeds 3 DH/m
3
(0.36 US
$/m
3
), especially when the depth of the well becomes higher. In addition to that,
there is also the problem of sea water intrusion due to an increase in the aquifer
depth which in some cases exceed 300 m (Faquir et al. 2007). The rise in the cost of
pumping water and the increase of sea water intrusion that causes ground water
salinisation makes it necessary to look for alternative water resources such as
desalinated water.
194 A. Hirich et al.
Fig. 13.4 Variation of piezometric level in the Souss and Chtouka aquifers between 1968 and
2005
13 Feasibility of Using Desalination for Irrigation in the Souss Massa Region... 195
13.6 Cost of Desalination
The cost of desalination depends mainly on the type of desalination process used,
the quality of the intake and product waters, the output capacity of the plant, and the
available options for waste disposal. They include:
• Investment costs (cost of land, equipment, civil works, etc.)
• Operation and maintenance (O&M) costs (energy, chemicals, labour, etc.)
• Environmental costs (water intake and environmental externalities, safe brine
disposal, etc.)
• Other indirect costs (insurance, etc.).
As an example, Table 13.4 details the installation (investment costs without land
costs) and the O&M costs of some types of desalination plants (FAO 2004). The
primary operating cost of desalination plants is power, which typically accounts for
44 % of the O&M costs of a seawater RO plant (considered less expensive than
thermal distillation). Thermal distillation processes for desalinating very highly
saline waters and seawater are relatively expensive because of high operating
temperatures and high construction costs. In contrast, RO processes for desalinating
brackish water are less expensive because they are modular in setup and simpler to
operate. However, a reduction in the costs of high-capacity seawater desalination
plants has been observed over time. The costs of desalinated water are relatively
high so that its major use is urban rather than irrigated agriculture.
Table 13.3 Cereals and horticultural production in the Souss Massa region (MAPM 2014)
Product 2010 National part (%) 2013 2020
Cereals 385 5 283 287
Vegetables 1480 77 1778 2140
Olive 27 2 28 43
Citrus fruit 646 39 893 1070
Other fruit 562 18 571 677
Table 13.4 Installation and operational and maintenance costs of various desalination plants
Desalination plant
Installation
costs
Water
production cost
US $/m
3
Multistage flash distillation 1200–1500 1.10–1.25
Multistage flash distillation (Singapore) 2300 1.50
Multiple-effect distillation 900–100 0.75–0.85
Multiple-effect distillation (Metropolitan Water District,
California, USA)
660 0.46
Vapour compression distillation 950–1000 0.87–0.95
Reverse osmosis 700–900 0.68–0.92
196 A. Hirich et al.
13.7 Desalination Project
Before the installation of this project, it is necessary to study the following key
points:
• Identify the user groups in order to determine the optimal level of desalinated
water production as well as the plant capacity, which is an important indicator
for its design
• Identify the potential sites of desalinated water production. For this purpose, it is
important to take deposits from wells close to the sea if the hydrogeological
conditions are convenient. The available studies at the Agency of the Hydraulic
Basin of Souss Mass and the National Office of Potable Water will be the subject
of all work to be carried out within this project. This work must be coupled with
identification of brine disposal sites.
• Determine the optimal approaches related to funding, organization and
management
• Ensure the availability of an adequate electricity network for the desalination
site
13.7.1 Greenhouses Farmers Survey
The Agrotech
1
association has conducted a survey, in collaboration with the
ORMVASM, among greenhouse producers in the Chtouka zone. The objectives
of this survey are:
• To identify the area equipped with greenhouses in order to determine their
spatial distribution
• To determine the total water volume used by farmers and the potential desali-
nated water volume required
• To canvass the opinion of farmers about the use of desalinated water for
irrigation and their interest in participating as stakeholders in the project
The survey covered 847 greenhouses farms with a total area of 12,770 Ha. The
obtained results are presented in Tables 13.5,13.6 and 13.7 (AGROTECH 2010).
During the running of the survey it was observed that the surveyed farms can be
divided to three categories:
1
The Agrotech association of the Souss Massa Dr^
aa (Agrotech SMD) is an association of
institutions created in 2006 in order to create an activity advanced center in the agro-technology
field in the Souss Massa Dr^
aa region, to help companies and institutions in the field of research and
development of food biotechnology. The association is public and based in the Agronomic and
Veterinary Medicine Hassan II Institute, Complex of Horticulture in Ait Melloul City.
13 Feasibility of Using Desalination for Irrigation in the Souss Massa Region... 197
• Group 1: farms located in the irrigated zone of Massa
• Group 2: farms located in the zone of SidiBibi and Khmiss Ait Amira
• Group 3: farms located in the zone of Biougra and Sebt Ait Milk (Fig. 13.5)
13.7.2 Importance of the Desalination Project
The Ministry of Agriculture was engaged in an irrigation project using desalinated
sea water in the Chtouka zone in the Souss Massa.
This project has a particular importance in Morocco as it is implemented within
the framework of the National Green Plan. The project will support agricultural
development in the Souss Massa region as it is the premier region in terms of
production and export of agricultural products with high added value. This project
will respond to the needs of vegetable and fruit producers in the Chtouka zone
where the aquifer is being used for irrigation and consequently being subjected to
Table 13.5 Main results element of the survey
Number of surveyed farms 847
Number of farms who want to join the project 782
Percentage (%) 92 %
Total surveyed greenhouses area (ha) 12,770
Actual greenhouse covered area (ha) 7986
Consumed water volume (m
3
) 54,729,087
Total area adhered to the project (ha) 12,186
Actual greenhouse covered area adhered to the project (ha) 7555
Required water volume (m
3
) 31,722,349
Table 13.6 Survey results in terms of area and volume
% Required volume (m
3
) Greenhouse area (ha)
Percentage of project membership 95 31,672,549 7555.10
Participation in the investment 67 23,724,146 5350.39
Pay 5–7 DH/m
3
(0.6–0.85 $/m
3
) 50 17,459,891 3996.30
Pay 8 DH/m
3
(0.97 $/m
3
) 20 6,183,842 1581.71
Pay 10 DH/m
3
(1.21 $/m
3
) 6 1,419,055 497.10
Table 13.7 Survey results in terms of farm number and volume
% Required volume (m
3
) Number of farms
Percentage of project membership 92 31,672,549 782
Participation in the investment 61 23,724,146 515
Pay 5–7 DH/m
3
(0.6–0.85 $/m
3
) 42 17,459,891 354
Pay 8 DH/m
3
(0.97 $/m
3
) 15 6,183,842 127
Pay 10 DH/m
3
(1.21 $/m
3
) 4 1,419,055 36
198 A. Hirich et al.
overexploitation due to over-pumping. This has resulted in the reduction of the
piezometric level and sea water intrusion. Furthermore, the surface water resources
in this area are very scarce. The surveys carried out in this area by the Ministry
departments showed that farmers were willing to join this project.
96%
77%
75%
33%
8%
0% 20% 40% 60% 80% 100%
Percentage of project membership
Participation in the investment
Pay 5 to 7 DH/m3 (0.6 to 0.85 $/ m3)
Pay ³ 8 DH/m3 (³ 0.97 $/ m3)
Pay ³ 10 DH/m3 (³ 1.21 $/ m3)
Group 1. Irrigated zone of Massa
95%
69%
38%
11%
7%
0% 20% 40% 60% 80% 100%
Percentage of project membership
Participation in the investment
Pay 5 to 7 DH/m3 (0.6 to 0.85 $/ m3)
Pay ³ 8 DH/m3 (³ 0.97 $/ m3)
Pay ³ 10 DH/m3 (³ 1.21 $/ m3)
Group 2. Sidi Bibi and Khmiss Ait Amira
93%
50%
39%
15%
3%
0% 20% 40% 60% 80% 100%
Percentage of project membership
Participation in the investment
Pay 5 to 7 DH/m3 (0.6 to 0.85 $/ m3)
Pay ³ 8 DH/m3 (³ 0.97 $/ m3)
Pay ³ 10 DH/m3 (³ 1.21 $/ m3)
Group 3: Biougra and Sebt Ait Milk
Fig. 13.5 Greenhouses farmers survey results
13 Feasibility of Using Desalination for Irrigation in the Souss Massa Region... 199
The worst-case scenario in the project zone predicts the disappearance of the
aquifer and a loss of about 9 billion DH (US $1.1 billion) of added value and
3 billion DH (US $363 million) of capital and more than 2830 permanent jobs by
2035 (Arrifi 2013).
13.7.3 Technical Components of the Desalination Project
The concerned area: 9000 ha (at the beginning of the project run) and 12,500 ha
(by 2035).
Required desalinated water: 55 Mm
3
/year (the aquifer water pumping should not
exceed 25 Mm
3
/year so that it is within the limits of renewable groundwater).
13.7.3.1 Desalination Plant
•Possible location: coastal site in the National Park of Souss Massa (between
Tifnit and Douira)
•Capacity: 111,000 m
3
/day in the beginning of the project run and 166,500 m
3
/
day by 2035
•Desalination technique: reverse osmosis with double pass Modular and
advanced plant to follow as the project expands in scope
13.7.3.2 Infrastructures of Pumping and Distribution of Desalinated
Water for Irrigation
• Pumping station to pump the desalinated water into a regulation and control
basin
• Pumping from the regulation basin to the mean distribution network
• Mean distribution network (Fig. 13.6)
• Pressuring station
13.7.3.3 Environmental Impact of the Desalination Project
A major environmental problem of water desalination is the production of a flow of
brine that contains the salts removed from the intake water that needs to be disposed
of. In addition, this brine may be polluted. This brine represents a significant
fraction of the intake water flow. Seawater desalination typically yields a brine
flow of 50–65 % of the intake water flow, with about twice the initial concentration
(FAO 2003).
The project will have a positive impact on the environment as it will contribute
significantly in the reduction of the overexploitation of the aquifer and
200 A. Hirich et al.
consequently the project will achieve equilibrium in terms of groundwater balance
as well as the sustainable use of the aquifer in the Chtouka zone.
The implementation site has been chosen to allow a zero impact especially on
the ibis protected in the National Park of Souss Massa where the project will be
installed. The infrastructure has been designed to control the brine disposal through
the use of modern technology. Marine cartography and mapping will be applied in
order to minimize the impacts and risks as much as possible.
13.7.3.4 Institutional Issues of the Project
The project will be built within the framework of a public service in partnership
with a private operator (Public-Private Partnership: PPP) who will be charged to
build, design and manage all the infrastructure related to sea water desalination and
irrigation.
• All the concerned members of the management (state, regional consul, users)
will provide a financial contribution to the initial investment. The contribution of
the members will be related to membership fees.
• Users will pay a membership fee to the operator in charge to use the desalinated
water for irrigation
• These financial contributions to the initial investment, their terms and condi-
tions, and also the price of a cubic meter of desalinated water will all be
determined by a study of the structure and devolution of the PPP project.
Fig. 13.6 Network distribution of the desalinated water
13 Feasibility of Using Desalination for Irrigation in the Souss Massa Region... 201
13.7.4 Structuring and Implementation of PPP Project
of Chtouka
• Due to the success of the El-Guerdane project, the Ministry of Agriculture has
selected the International Finance Corporation (IFC), a member of the World
Bank Group, as the main consultant to assist in the structuring and implemen-
tation of the transactions related to the project.
• The structuring study will allow the determination of the feasibility of the project
and will designate, by international tender, the operator who will proceed to
build up and install all the desalination and irrigation infrastructure and who will
further the project management for a period of operation of 30 years.
• The structuring study is necessary to analyse the risks related to the project
(especially financial risks, profitability and availability of potential operators,
etc.). It is a complex project, innovative, with a high technology level and the
first in Morocco.
• Currently, the first phase of the project structuring study, which consisted of
carrying out the feasibility study and identifying the strategic options available
to realize the project, has been achieved. The Moroccan government is in the
process of preparing the funding of the project and making some decisions
regarding some technical aspects.
• Once the decisions on the strategic options are made, the government will
proceed to launch the selection process by an international tender in order to
choose the operator who will be in charge of bringing the project to completion.
List of Figures
Fig. 13.1 Aquifers map of Souss Massa Region
Fig. 13.2 Variation of precipitation in the Souss Massa region
Fig. 13.3 Water balance of Souss and Chtouka aquifers
Fig. 13.4 Variation of piezometric level in the Souss and Chtouka aquifers between 1968 and 2005
Fig. 13.5 Greenhouses farmers survey results
Fig. 13.6 Network distribution of the desalinated water
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