Helmand Valley Water Management Plan

Presented By: Jason Needham, P.E. (HEC)

Project Team: HEC, AED, USAID

USACE, Hydrologic Engineering Center

Problem Statement

� Over 25 years of turmoil has lead to deficientwater management in Afghanistan� Construction� Maintenance� Operations� Technical

� Capacity� Equipment

Project Overview

� Purpose� Develop water management plans for Helmand

Valley� Restore water management institutional capacity

in Afghanistan

� Two phase process� Funded and managed by US Agency for

International Development (USAID)� Contracted with USACE Afghanistan Engineering

District (AED) and USACE Hydrologic EngineeringCenter (HEC)

The Helmand Valley

� Drainage area� 160,000 km2

� 31% of country

� Helmand River� AY~14 Billion m3

� Kajakai Reservoir

Kajakai Reservoir

� Max Capacity - 3.2 Billion m3

� Water supply� Irrigation� Wetlands� Iran

� Hydropower� Existing - 33 MW� Design - 150 MW

Phase I

� Goals� Provide updated information on the capacity of the

Helmand system to support water resourcedemands.

� Evaluate immediate improvements to the systemand provide information for long-term planning ofwater resources.

� Begin capacity building process.

Phase I – Tasks

� Hydrologic Data� Data gathering and validation

� 42 stream gages� 1950s through late 1970s

� USGS – 1991 event� Institutional capacity building

� Ministry of Water and Energy Engineers (6)� Two week water management training in US

� Site visits� Joint Operation Center (DWR, USGS, NWS, USACE)� Gage sites� Irrigation districts� Large reservoirs and hydropower facilities� Small reservoir and water diversion structures� Irrigation management information system

� Introduction to water management software

Phase I – Water Management Tour

Phase I – Water Management Tour

Phase I – Tasks (Continued)

� Preliminary Water Budget Analysis� Update information on capacity of Kajakai

Reservoir for irrigation supply and powergeneration� Simulation Model

� Existing configuration� Existing power/gated spillway� Expanded power/gated spillway� Raised dam/expanded power/gated spillway

� Use historic inflow record� Demands

� Various levels of irrigation demand� Iran treaty requirements

Phase I – Tasks

� Inflows vs. demand

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Flow

(Mm

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Inflow Demand

Simulation Model – HEC-ResSim

� Rule-based� Multi-purpose

systemsimulation

� Networkstructure –objectstructured.

Water Supply Comparison – 50% Demand

With Gates

Without Gates

Water Supply Comparison – 50% Demand

With Gates

Without Gates

Water Supply Comparison – 100% Demand

With Gates

Without Gates

Water Supply Comparison – Raised Dam

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Date

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Total Shortage - Proposed + Raise

Total Shortage - Proposed

Phase I – Tasks (Continued)

� Preliminary Water Budget Analysis (cont.)� Preliminary rule curves� Time to fill estimate� Report

� Define Phase II

Phase II

� Comprehensive simulation model� Tributaries� Demands� Hydropower vs. irrigation trade-off

� Reservoir regulation manuals� Training

Contact

� Jason Needham� US Army Corps of Engineers� Hydrologic Engineering Center� Davis, CA 95616� (530) 756-1104� Jason.t.needham@usace.army.mil