Challenges in predicting mitigating and responding to drought
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Challenges in Predicting, Mitigating, and Responding to Drought. National Academy of Sciences. Chandra S. Pathak, PhD, PE, D.WRE, F.ASCE Hydrology Hydraulics & Coastal Community of Practice Engineering and Construction Division US Army Corps of Engineers – Headquarters Washington DC.

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Challenges in Predicting, Mitigating, and Responding to Drought

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Challenges in Predicting, Mitigating, and Responding to Drought

National Academy of Sciences

Chandra S. Pathak, PhD, PE, D.WRE, F.ASCE

Hydrology Hydraulics & Coastal

Community of Practice

Engineering and Construction Division

US Army Corps of Engineers – Headquarters

Washington DC

Nov 7, 2013

US Army Corps of Engineers

BUILDING STRONG®


USACE Mission Areas

BUILDING STRONG

Military Programs

Homeland

Security

  • MILCON for Modular Force

  • Global Positioning

  • BRAC 05

  • Field Force Engineering

  • MILCON Transformation

  • Environmental Restoration

Civil Works

  • Critical Infrastructure

  • Water Supply, Navigation

  • Flood Risk Management

  • Regulatory, Hydropower

  • Recreation, Disaster Response

  • Environmental Restoration

  • Anti Terrorism Plans

  • Intelligence

  • Facility Security

Partnership

Real

Estate

Interagency

Support

Research & Development

  • Water Resources

  • Environment

  • Installations

  • Warfighter

  • Federal

  • State

  • Local

  • International

  • DOD Recruiting Facilities

  • Contingency Operations

  • Acquire, Manage and

  • Dispose

BUILDING STRONG®


Infrastructure in USACE

  • Portfolio Stats:

    • Very Large

    • Aging (+55 years)

    • Relatively untested

    • Geotechnical Challenges Dominate

702 Dams

“Infrastructure follows Floods,

People Follow Infrastructure”

+2,500 Levee Systems


USACE - Our Mission:Regulate Reservoirs to Support Congressionally Authorized Purposes


Flood Risk Management

Low Flow Augmentation

for Navigation & Water Quality

Secondary

Water Supply

Hydropower

Recreation

Fish & Wildlife Conservation

Primary

Dams/Reservoirs Project Purposes


INDUCED SURCHARGE POOL

FLOOD CONTROL POOL

CONSERVATION POOL

(Water Supply, Hydropower….)

INACTIVE POOL

Storage Zones

Tainter

Gate

DAM


Water Control Manuals

  • The main purpose of a manual is for day-to-day use in water control for essentially all foreseeable conditions affecting a project or a system

  • Division and district commanders will develop water control plans as required by Section 7 of the 1944 Flood Control Act, the Federal Power Act and Section 9 of Public Law 436-83 for all projects located within their areas, in conformance with ER 1110-2-240

  • They must be prepared in compliance with the guidelines presented in :

    • Engineering Regulation ER 1110-2-240, Water Control Management

    • Engineering Manual EM 1110-2-3600, Management of Water Control System

    • Engineering Regulation ER 1110-2-8156, Preparation of Water Control Manuals

    • Environmental Operating Principals ER 200-1-5.


Drought Operations

  • Drought... abnormally dry and/or unusually warm weather sufficiently prolonged for the corresponding deficiency of water to cause a "serious hydrologic imbalance“

  • Reservoirs: Every reservoir has a Drought Contingency Plan which provides for releases for downstream communities.

  • Mississippi River Locks: Typically there are no drought operations; inflow = outflow.


Challenges, Issues and Concerns

  • Aging infrastructure – during rehab reduced storage capacity for floods and droughts

  • Climate change – frequent floods and droughts

  • Increase flexibility of systems operations through revision and updating of water control manuals

  • Need more accurate (reduced uncertainty) short-term and long-term forecast for rainfall and drought from NWS/NOAA to improve water management operations and planning.


Questions?


BACK UP Slides


U.S. Drought Forecast


Precipitation Outlook


7-Day Quantitative Precipitation Forecast (QPF)


National Gauging Program


Water Supply

  • The Corps can enter into Water Supply agreements for municipal or industrial use.

  • The Corps can also enter minor water supply agreements during State declared droughts.

  • Water Supply accounts for a minimal amount of storage in Corps Lakes.


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