Dam Safety Panel of Experts (Hydrology and Hydraulics Specialist)

Asian Development Bank (ADB)

Pakistan 🇵🇰

Expertise: Hydrology and Hydraulics expert
Expertise Group: Engineering

Consultant Source: International
TOR Keywords: Hydrology and Hydraulics expert

Objective and Purpose of the Assignment

  1. Pakistan’s Water and Power Development Authority (WAPDA) desires to develop the Naulong Multipurpose
    Dam Project (NMDP) consisting of a 57 m high dam at the downstream end of the Mula River, storing 247
    MCM, irrigating 19,000 ha, providing 13.5 MCM of water for household use and generating 4.4 megawatt
    (26.6 gigawatt hours) of hydropower.
  2. A Dam Safety Panel of Experts (DSPOE) will be established to provide technical review of the detailed
    designs and ensure that the dam safety is assured over the long term and that the dam and reservoir are
    sustainably developed, operated, and maintained. The Panel will be appointed, in line with their
    individual experts under framework contracts, throughout the project preparation and implementation
    phases, up to the first period of the operation phase.
  3. The safety assessment of the Dam and associated structures will be carried out in line with the
    relevant regulations of the Pakistan Government as well as international technical standards, such as
    those of the International Commission on Large Dams (ICOLD). The DSOPE will review and provide the
    Client with recommendations on detailed designs, bidding documents, construction plan, implementation
    schedules, etc.

Scope of Work

The DSPOE will consist of four (4) members each with 2 person-months input:

(i) Dam Specialist / Chairperson;
(ii) Geotechnical Specialist;
(iii) Hydrology and Hydraulics Specialist; and
(iv) Hydro electrical and Mechanical Specialist.

In addition to the four experts, other experts, subject to actual requirements, may be mobilized for
implementing specialized reviews.

  1. The Client will organize periodic working missions for the DSPOE at the dam site depending on
    requirements in each phase of project implementation. The Client will provide the DSPOE with documents,
    drawings, information, and data required for safety review. The DSOPE will prepare, sign, and submit a
    Report before completion of each mission. The Report should indicate issues to be paid attention to and
    propose recommendations. The Chairperson (Dam Specialist) will be responsible for coordinating
    activities of the DSPOE, presiding at meetings, making final decisions, and finalizing the DSPOE’s
    Reports.

Detailed Tasks and/or Expected Output

Hydrology and Hydraulics expert (2 P-Ms) – (Intermittent Input for the Period of 07 Months)
1) Tasks
The key tasks of the Hydrology and Hydraulics Expert on the DSPoE include, but are not necessarily be
limited to, the following:
i. Review of the hydrological and hydraulic engineering aspects of the design reports;
ii. Review of the hydraulic design of the spillway;
iii. Review of the criteria, methodology and adequacy of the design flood, flood routing studies, and
spillway capacity and recommend measures if any;
iv. Review of the overall reservoir operational rules for water supply for irrigation and domestic water
use, flood control and power generation including operational records (reservoir water level,
inflow, discharge volume, etc.) and hydrological/meteorological monitoring data;
v. Review of the overall construction plan and the discharge for selected return periods of both
upstream and downstream cofferdam arrangements from hydrological and hydraulic aspects;
vi. Recommending additional actions and measures to assure the safety of the dam’s design and
construction plans considering potential hydrological / hydraulic risks and required safety level if any;
vii. Review of the hydrology and hydraulic aspects of the technical specifications and drawings of the
bidding documents and provide technical support of the hydrology and hydraulic design aspects of the
bidding process, including pre-qualification, bid evaluation, contract negotiations;
viii. Review of the adequacy of hydro-meteorological monitoring instruments, including their numbers,
locations, monitoring frequency, etc.;
ix. Review of sedimentation issues in the reservoir and management strategy / plan for ensuring long
term sustainability; and
x. Coordinating with the DSPoE chair and other panelists for fulfilling the assignments in the field and
his/her home offices under the guidance of the client; and

2) Deliverables
Preparation of the Hydrology and Hydraulics component of the DSPoE report covering:
i. Contribute to the Panel’s comprehensive report during each visit and meeting, as directed by the
Chair of the Panel;
ii. Review report on the hydrological and hydraulic engineering aspects of the design reports;
iii. Review report on numerical and physical model studies;
iv. Review report on the design criteria and specifications of the hydraulic structures, as well as
drawings and construction plans;
v. Review report on the hydraulic design of hydraulic structures;
vi. Review report on the criteria, methodology and adequacy of the design flood, flood routing studies,
and spillway capacity and recommend measures if any;
vii. Review report on the overall reservoir operational rules for flood control and power generation
including operational records (reservoir water level, inflow, discharge volume, etc.) and hydrological
/meteorological monitoring data;
viii. Review report on the overall construction plan and the discharge for selected return periods of
both upstream and downstream cofferdam arrangements from hydrological and hydraulic aspects;
ix. Recommendations on additional actions and measures to assure the safety of the dam’s design and
construction plans considering potential hydrological / hydraulic risks and required safety level if any;
x. Review report on the hydrology and hydraulic aspects of the technical specifications and drawings of
the bidding documents and providing technical support for the hydrology and hydraulic design aspects of
the bidding process, including pre-qualification, bid evaluation, contract negotiations;
xi. Review report on the adequacy of hydro-meteorological monitoring instruments, including their
numbers, locations, monitoring frequency, etc.; and
xii. Review report on sedimentation issues in the reservoir and management strategy / plan for ensuring
long term sustainability if relevant.

Minimum Qualification Requirements

The Hydrology & Hydraulic Specialist should meet the following strongly preferred requirements:
• Masters’ degree in Hydrology, Hydraulics, Water Resources or related field or other relevant majors;
• Ideally 25 years of experience in relevant professional works;
• 10 Years Extensive experience is strongly preferred in designing and construction of large dams;
including hydrological and hydraulic aspects of construction planning and scheduling for large-scale or
complex dam projects; hydrological and hydraulic aspects of dam safety planning, instrumentation, and
monitoring; and reservoir sedimentation assessment and management.
• 03 Years work experience in the region.

Minimum General Experience: 25 Years
Minimum Specific Experience (relevant to assignment): 10 Years


POSITION TYPE

ORGANIZATION TYPE

EXPERIENCE-LEVEL

DEGREE REQUIRED

IHE Delft MSc in Water and Sustainable Development