Indonesia nationals: Hydrologist/ Modeler
Objective and Purpose of the Assignment
The Asian Development Bank (ADB) is providing technical assistance to the Government of Indonesia to
prepare the Enhanced Water Security Investment Project (EWSIP). The project will support the Government
to improve selected dimensions of water security (economic water security and resilience to water-
related disasters) for which Indonesia lacks. The project will promote an integrated river basin
management approach with the following objectives: (i) improving water resources planning and management
to meet rising demands for irrigation and non-agricultural users; (ii) minimizing spatial and temporal
variations in water availability by improving water storage facilities and conveyance; and (iii)
increasing resilience to climate change. The International Fund for Agricultural Development (IFAD) is
expected to provide parallel collaborative cofinancing to improve land management in upper river basins.
The project will implement selected infrastructure subprojects that will be designed under the
Accelerating Infrastructure Delivery through Better Engineering Services Project including four flood
risk management and one bulk water supply subprojects. It will also implement two flood risks management
subprojects to be prepared under Flood Management in Selected River Basins Sector Project. Detailed
engineering designs, environment and social safeguards documents and permits, and bidding documents will
be prepared as per ADB standards for those selected subprojects.
Through its partnerships, ADB will introduce innovations to inform the design of the project: (i) water
accounting using satellite data to predict water availability, adjust engineering design, and improve
water allocation planning through the partnership between ADB and UNESCO-IHE; and (ii) piloting
benchmarking and monitoring of land use change and erosion through the partnership between ADB and the
European Space Agency. Funding from the climate change fund will be explored for preparing the climate
risk vulnerability assessments for the selected river basins.
Scope of Work
The services will provide support to (i) conduct consultations with the Ministry of Public Works and
Housing (MPWH) and river basins stakeholders to finalize the scope of the project, and to ensure that
innovations are built into the investment; (ii) undertake due diligence of technical, social, financial,
environmental, gender, and economic aspects of the project; and (iii) ensure that subprojects designed
under on-going (i.e., L3455-INO: Accelerating Infrastructure Delivery through Better Engineering
Services Project and L3440-INO: Flood Management in Selected River Basins Sector Project) and new ADB
projects are complying with ADB’s technical, environment and social safeguards and fiduciary
requirements. The major outputs include finalization of project scope, preparation of the design of the
ensuing project and readiness in accordance with ADB standards (safeguards, detailed engineering design
and climate change).
Detailed Tasks and/or Expected Output
(i) Develop hydrology models to represent historical and future conditions water availability at river
basin and sub-basin scales by using HEC-HMS and review/validate the outcomes in coordination with
central/local agencies in the context of water availability in the reservoirs, water allocation plans;
and optimization of (large and small) dams’ operations (including multi-purpose, hydropower, irrigation,
flood attenuation and domestic water storage dams) through use of water demand management strategies.
(ii) Review existing studies on upstream watershed management practices, changes in land use-land cover
and climate change. Customize hydrology models to reflect the impacts on water availability.
(iii) Customize the water availability hydrology models to reflect four EWSIP scenarios; Scenario 1:
existing conditions, Scenario 2: proposed conditions with the infrastructure measures of central/local
agencies, Scenario 3: enhancements introduced with EWSIP, and Scenario 4: enhancements of EWSIP with the
impacts of climate change.
(iv) Develop flood hydrology models to characterize flood events with different return periods (5-year
to 100-year) by generating site-specific storm precipitations through intensity-duration-frequency
curves. Evaluate the impacts of natural and man-made structures (i.e., retention basins, reservoirs) on
flood storage, flood routing, and associated water allocations for optimized supplies to various users
and optimization of dam operations by including the impacts of climate change. Provide recommendations
for water allocations to other users and dams operations for more sustainable use of water resources,
including identifying interdependencies and linkages to water users across sectors particularly energy
and domestic, municipal, industry.
(v) Customize the flood hydrology models to reflect four EWSIP scenarios; Scenario 1: existing
conditions, Scenario 2: proposed conditions with the infrastructure measures of central/local agencies,
Scenario 3: enhancements introduced with EWSIP, and Scenario 4: enhancements of EWSIP with the impacts
of climate change.
(vi) Review soundness of hydrological computations for infrastructure subprojects prepared under the
Accelerating Infrastructure Delivery through Better Engineering Services Project (four flood risk
management and the one bulk water supply subprojects) and two flood risks management under the Flood
Management in Selected River Basins Sector Project.
(vii) For each selected river basin, support the preparation of a technical and institutional assessment
and requirements for capacity building in data acquisition and management, and numerical modeling
(hydrology and hydraulics); a hydrometerological network rationalization plan, capacity development
program for river basin numerical modeling (hydrology and hydraulics) and data management including
transfer of knowledge and technical support from relevant institutes such as the National Research
Center for Water Resources to the local river basin organizations. Evaluate expansion of the networks of
hydrometeorological stations (precipitation and river stage) to improve real-time data acquisition at
the river basin level for higher level of accuracy in estimating water availability and flood volumes.
(viii) Facilitate focus group discussions to review project preparation progress.
Output/ Reporting Requirements
The consultant will prepare the following formal reports, in addition to any necessary working papers or
reports required for the preparation of the proposed investment projects:
(i) Technical reviews for selected river basins of (a) water allocations, data management, and modeling,
(b) feasibility studies prepared under L3455 and L3440 and other project locations;
(ii) Hydrology models representing water availability and flood volumes for selected subprojects
developed and calibrated/validated for each one of the scenarios analyzed by EWSIP;
(iii) Monthly administrative reports following ADB template (monthly); and
(iv) Working Group materials and discussion and technical notes as required.
Minimum Qualification Requirements
The consultant must have a higher degree (M.Sc. or equivalent), in civil engineering or water resources.
The consultant must have at least 10 years of relevant experience in preparing hydrology models analysis
(for both water availability and floods) and hydrodynamic modeling for flood risks management, large and
small dams with strong focus on operational and technical matters. Experience in designing and
operational optimization of dams including hydrological assessments, and mathematical modeling for flood
routing, institutional and policy aspects of dam management, and operational efficiencies in terms of
climate change adaptation and socio-environmental aspects is essential. Experience in hydrology model
development to optimize basin water resources and climate change vulnerability assessment of water
projects is also essential. Knowledge of the government planning cycle, procurement procedures and
financial management mechanisms would be an advantage. He/she must have excellent written and oral
communications skills in English.
Minimum General Experience
Minimum Specific Experience (relevant to assignment)