Appendix A. Scope of Work
Tender, Implementation of Automated Drip Irrigation and
Water Purification Systems, Sawki, Niger
1. Scope of Works
This scope of work includes the design, construction, startup and training support required for a
simple and innovative irrigation system, using mobile technologies to reduce the work load for the
program’s beneficiaries, especially women, for gardening and access to potable water in the
households and livestock. The project will be conducted as a design/build project where the
Contractor must field verify the system ground and water level elevations, distribution and
irrigation piping lengths prior to tendering The works include:
 Putting in place an irrigation system at vegetable farming sites for the women’s gardens, using a
technology through mobile phone to automatically water gardens;
 Improvement of the water quality for human consumption.
This will involve:
 Evaluate site conditions, water elevations, ground elevations and piping lengths
 Develop design meeting criteria on following tables
 Installation of a solar powered well pump and associated photovoltaic (PV) array at each
of 6 sites
 Establish a drip irrigation system at 6 vegetable production sites of 0.75 ha each;
 Installation of water purification equipment on each site around the 6 wells where women
practice vegetable gardening.
The proposer shall provide individual designs for 6 complete and operational systems.
Components shall be selected to meet the flowrate indicated and accommodate the groundwater
levels and site layout and elevations shown.
2. Work Layout
a. Works Layout: The Mercy Corps WASH Engineer will provide all the control points and
phases and benchmarks the necessary criteria for the layout of the works.
b. Verification and monitoring: The Mercy Corps Engineer shall have full access authority to
all sites to conduct checks and verify work progress, the lines and categories established
by the company, contractor or developer and determine the compliance of the
accomplished works, as they progress in accordance with plans and specifications.
3. Description Drip Irrigation System
The components of the drip irrigation system to be installed consist mainly of the following:
 A mobile phone technology system: installation of a technology using a mobile phone to
remotely water the garden and be able to control the overall irrigation system from a well,
tank or other water sources, for the six sites indicated above. The depth to water in a well may
vary from 10 to 23m. To install the irrigation system, the package shall comprise:
 A source of energy using solar system with solar panels installed in a station;
 a submersible pump with a minimum capacity of pulling 4 m3/hr to water the
storage tank;
 a primary water distribution network of drip system;
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
a remote control system or software using mobile phone that can automatically set
off water from the water source and water the garden through the drip irrigation
distribution channels,
A server or solenoid module system for the reception of a network signal from a
mobile company. Battery power recharged from the solar panels shall be provided.
A dripping network equipped with flexible piping with dripper under crops’ trunks
for an easy watering,
The distribution piping, valves and fittings from the well to the storage pump and
the storage tank to the start of the drip irrigation system shall be sized for a pipe
velocity of <1m/s. Such pipes shall be rated at PN6 and should be a minimum 40
mm diameter. All accessories including fittings and connectors, PVC pipes, elbows,
tees and tops. The installation must meet the standards required by the
manufacturer for drip irrigation network placement. Distribution piping shall be
buried a minimum of 0.7 meters. Irrigation piping in the field may be laid at ground
level. Isolation valves shall be provided at the inlet and outlet of tanks, tank drain
lines and pump discharges. A grade check valve shall be provided at ground level of
pump discharge. This check valve shall be in addition to the internal check valve
supplied with the pump.
All materials that will be in direct contact with drinking water must be non-toxic
and must be the standard approved materials for use in drinking water systems
installation. All faulty materials should be replaced before completion of all works.
Valves and fittings shall be installed in accordance with the piping to allow an easy
maintenance.
4. A Water Purification System
4.1 Specifications and Installation
 The water purification kiosk is a system that can directly disinfect and purify water so it is
safer for human consumption.
 The potable water kiosk in rural areas is a device, container or tank used for water
treatment (sedimentation, filtration and disinfection) for domestic consumption. The
system uses innovative technologies including (i) the mobile phone to control and trigger
water pumping from aquifers, (ii) the use of ultraviolet ray to disinfect water.
 The purification tank must be made of a UV box which will contain conventional decanting
filters and a cathode tube containing a UV lamp with high concentration solar UV radiation
that can be used to disinfect water to achieve 100% purification. Headloss through the
treatment unit shall be compatible with available system head.
4.2 Materials Composition and Quality
 The whole system is composed of a tank containing sedimentation filters, a glass tube
containing a UV lamp 21 with a high concentration of solar rays, all connected by PVC
tubing to the pump and connected via a telecom immersed piloting module. The UV lamp
and the telecom unit will be powered by solar energy.
4.3 Disinfection or water purification
 The water purification system must be well rinsed to remove dirt and impurities and be
sterilized after completion of the installation and testing of water distribution system,
water pipes
5. Operation and Control Strategy.
The following strategy guides the design and operation of the irrigation system.
 Pumping system will fill the storage tank when sufficient sunlight is available.
 Distribution of irrigation and treated water shall occur during an 8 hour period.
 Flow from the storage tank to the distribution system and the treatment unit shall occur
simultaneously.
 The storage tank is provided to supply a minimum of 2.5 hours of storage at 4 m3/hr
 No power storage (battery) included.
 Pumps and water treatment units operate on DC power - no inverter included.
 Pump will operate based on the water level in the storage tank
 Irrigation water supply from tank outlet will pass through a control valve which is activated
by a wireless signal from a cell phone.
 No remote alarms or readouts are included.
 A flow senor shall be provided to deactivate the pump if no flow is detected due to loss of
pump suction resulting from groundwater drop or other reasons.
 A high level float valve shall be provided to prevent overflow of the storage tank.
The float
valve shall be installed at the high water level and be installed on the fill pipe from the
pump. This shall be a municipal grade version of the type of valve that controls flow to a
modern toilet flush tank.
5.2 Installation
The bottom of all trenches must be carefully shaped, sized, and aligned with the
instructions and guidance from the Mercy Corps Engineer before installing any pipe.
The ground or dripping network must be installed and should work upon so that the slope
is not visible on the surface.
The installation of facilities must be carefully completed in line with technical standards in
drip irrigation systems
5.3 Test
After the pipe laying and the line flushing, it must be filled with water with much care so as
to flush out all the air in the line. During the testing period all the pipes, faucet, fittings and
washer should be carefully examined for defects. Any observed leaking or defective pipe
must be repaired or replaced by the Contractor. The test must be repeated until the
section is tested within the piping manufacturer’s standards. The water distribution
system (or parts of it) must be tested under pressure. All the completion of all works, the
final test must be conducted in the presence of the Mercy Corps Engineer or designated,
who shall be informed at least 24 hours in advance of the start of the test.
The Contractor shall provide pumps, pipes, fittings, accessories, gauges, meters, and other
necessary equipment and accessories. The Contractor is also responsible for providing
laborers and necessary labor to conduct the installation and tests. All testing costs shall be
on the Contractor. All pressure tests and leakage must be conforming to standards.
6. Post Technical Works Activities
6.1 Cleaning
The contractor must undertake the cleaning of the areas where pipes have been installed,
surrounding areas, and must collect all the waste and debris resulting from the works. The
contractor must also fill up the holes and smooth ruts, repair all ground damages around the
sites, restore the ground to stable and appropriate conditions as may be reasonably
required, so to put back the soil and surface to conditions before works started.
6.2 Training
At the end of the works and in order to allow water users and sites operators to manage the
infrastructure network, the Contractor should:
 Train a management committee on the operation of the system
 Provide a tool box for repair/maintenance and troubleshooting;
 Train the committee on the maintenance of the infrastructure
 Train the committee on water container/kiosk hygiene
 Train the water committee on cash management collected from water sales. Such collected
funds will be used for the small maintenance activities.
 The location of specific connections and all useful information are identified and mapped in
a plan. The location of the corners, elbows and specific points must be, as much as
possible, on fixed marks, easily identifiable.
6.3 Information on existing hydraulic infrastructure (deep wells)
Work on both the installation of drip irrigation and water purification shall be undertaken
in the communities below:
 Baourataoua;
 Hannou Gazanné;
 Katare Moussa;
 Fourra Guirké
All these communities are located in the municipality and department of Guidan Roumdji in the
Maradi region of Niger.
Table: Summary of the works sites
Department
Commune
Villages
Guidan
Roumdji
Guidan
Roumdji
Baourataoua
Nord
Guidan
Roumdji
Guidan
Roumdji
Baourataoua
west
Guidan
Roumdji
Guidan
Roumdji
Baourataoua
South
Situation after Work
- Sinking under the water table 4m
- Boundary wall
- Anti Quagmire and spillway
- Chain-link fence 0.75 ha for vegetable
farming
- Basin and canal
- Depth to groundwater 22m
- Rehabilitated boundary wall
- Anti Quagmire and rehabilitates weir
- Chain-link fence 0,75ha vegetable farming
- Basin and Canal
- Depth to groundwater18m
- Sinking under the water table 4m
- Boundary wall
Guidan
Roumdji
Guidan
Roumdji
Kataré Moussa
Guidan
Roumdji
Guidan
Roumdji
Foura Guirke
Guidan
Roumdji
Guidan
Roumdji
Hannou Gazane
- Anti Quagmire and spillway
- Chain-link fence for vegetable farming
- Basin and Canal
-Depth to ground water 20m
- Rehabilitated boundary wall
- Anti Quagmire and rehabilitates weir
- Chain-link fence 0,75ha vegetable farming
- Basin and Canal
- Depth to groundwater 24m
- Rehabilitated boundary wall
- Anti Quagmire
- Chain-link fence 0,75ha vegetable farming
- Depth to groundwater 20m
- Anti Quagmire and spillway
- Chain-link fence 0.75 ha
- Depth to groundwater 17m
7.0 Required Submittals:
As part of their tender, tenderers shall submit calculations for the sizing and selection of the
proposed mechanical and electrical systems. The format of such calculation shall include the
information shown below. Calculations showing the proposed number of PV panels shall also be
provide.
7.1 Sample Power Generation Calculations
Pump
Metric
Suction Lift
Lift to Ground Surface1
Lift to Storage from ground surface
Head Loss
Total Dynamic Head
Flow Rate
Pump Power Required
UV Water Treatment
Metric
Required Contact Time
Volume of water treated
Flow Rate
UV Power Required
Unit
m
m
m
m
m
m3/hr
W
Unit
min/cycle
m3/cycle
m3/hr
W
Value
XXXX
XXXX
XXXX
XXXX
XXXX
4.0
XXXX
Value
XXXX
XXXX
XXX
XXXX
Pump power requirements + water treatment requirements = total power required
1
Shall include 20%? additional lift to account for future groundwater depression
See schematic layout below in Annex 1.
7.2 Submersible Pump
Submittal shall include materials of construction, controls, spare parts, O&M manuals, and
wiring diagrams.
7.3 Water Treatment Unit
Submittal shall include materials of construction, spare parts, O&M manuals, wiring
diagrams, provisions for filter backwashing, required head for system operation, and curves
for head loss vs flow rate.
8.0 Bill of Quantities
Tenderers shall complete the BOQ below to clearly indicate how they will provide 6 complete and
operational systems
Description
Unit
Quantity
Notes
Submersible pump,
installed with wiring
and controls, DC
powered with no
battery backup
UV water
disinfection unit
installed with wiring
and controls
solar panels
HDPE water storage
tank
Distribution pipe
no.
6
Manufacturer Lorentz, Mono or approved
equal; design flow rate=4.0m3/hr, required
head=varies by site
no.
6
no.
no.
48
6
m
600
Drip irrigation piping
m
4000
Misc. valves, fittings,
and appurtenances
Telemetry control
unit with batteries
Cellular phones
Spare parts
Lump sum
no.
6
Manufacterer= Water Sys TI, Model=
WS1109TI or approved equal; min. flow
rate= 0.55l/s; with filtration and uv
disinfection modules,
Fixed, corrosion-resistant frame
Capacity: 10 m3minimum, with sediment
drain and level control float
pump to tank, tank to irrigation system,
PN6
PVC or HDPE, per installer
recommendation, PN6
PN6
no.
units
6
site
asperseur/goutteur,
6 lamp uv 21
Mobilization, cleanup, security, panel
support, remote system irrigation and
accessories etc.
All other items
Lump 6
necessary for a
sum
complete and
operational system
Total cost will show all applicable taxes and without taxes on another line
Total Cost
Extension (??)
Annex 1
Figure 2:Typical Site Layout
Table X: Site Elevations to be determined by the design build contractor
Site Name
Average depth
to Groundwater
Ground
elevation at well
Water surface
elevation in
storage tank
Average
elevation of
irrigation fields
Baourataoua
Nord
22m
Baourataoua
West
18m
Baourataoua
South
20m
Kataré
Moussa
24m
Foura
Guirke
20m
Hannou
Gazane
17m
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