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USACE CWMS - Mississippi River Watershed MVS

Authors: Jessie Myers
Owners: Jessie Myers · Jason Sheeley · Adrian Christopher · Mayss Saadoon
Resource type:Collection Resource
Created:Jun 29, 2018 at 1:43 p.m.
Last updated: Jul 10, 2018 at 8:36 p.m. by Jessie Myers


The Corps Water Management System (CWMS) includes four interrelated models to assist with water management for the basin:

- GeoHMS (Geospatial Hydrologic Modeling Extension)
- ResSIM (Reservoir System Simulation)
- RAS (River Analysis System)
- FIA (Flood Impact Analysis)

The Mississippi River Basin is the largest river system in the United States, covering approximately 1.15 million square miles, or over 40% of the area of the Continental U.S. Several large tributary rivers flow into the Mississippi, including the Missouri, Ohio, and Arkansas Rivers. Maximum topographic relief varies from approximately 1,475 feet near the headwaters at Lake Itaska to 0 feet at the Gulf of Mexico. The portion of the Mississippi River Basin that is covered in this CWMS project drains approximately 15,475 square miles.

The Mississippi River in the St. Louis District covers a centerline distance of about 300 miles, flowing generally from the northwest to southeast, from Lock and Dam #22 in Saverton, MO to the mouth of the Ohio River near Cairo, IL. The topography of the basin is characterized by hilly upland terrain and broad, flat floodplain area near the main stem of the river, although there are some areas with steep bluffs above the channel banks. The Mississippi River channel invert ranges in elevation (within the St. Louis District) from about 430 feet at Lock and Dam 22 to about 250 feet at the confluence with the Ohio River. The typical estimated Mississippi River channel invert slope in the District is 0.5 feet per mile. Within the St. Louis District, the main tributaries are the Salt, Cuivre, Illinois, Missouri, Meramec, Kaskaskia, Big Muddy, Castor, and Cache Rivers.

Soils in the basin were predominantly deposited by the succession of continental glaciers that advanced and retreated across the area during the Great Ice Age. These sediments fall into three major categories: till, lacustrine deposits, and outwash sediments. Loess soils can also be found within the basin. In general, the soils in the basin are rich in organic matter and help explain the major land use categories: agriculture and forested areas. The climate for the basin is considered moderate and is characterized by hot summers and cool winters. The basin lies within the humid continental climate, and the area experiences four distinct seasons. Average annual rainfall is approximately 45 inches across the basin, and typically the maximum precipitation occurs in the spring (April, May, and June) and again in late November.

Subject Keywords

ResSIM,FIA,GeoHMS,USACE,IWRSS,Meramec Watershed,Illinois Watershed,USACE Corps Water Management System (CWMS),Mississippi River Watershed MVS,RAS,Cuivre Watershed,Cache Watershed

How to cite

Myers, J. (2018). USACE CWMS - Mississippi River Watershed MVS, HydroShare, http://www.hydroshare.org/resource/8231b01d8fb94b478fac21e0da2a49b8

This resource is shared under the Creative Commons Attribution CC BY.


Sharing status:

  • Discoverable Resource  Discoverable
  • Non Sharable Resource  Not Shareable



 Coordinate System/Geographic Projection:  WGS 84 EPSG:4326
 Coordinate Units:  Decimal degrees
Place/Area Name: Mississippi River Watershed MVS

North Latitude
East Longitude
South Latitude
West Longitude


The people or organizations that created the intellectual content of the resource.

Name Organization Address Phone Author Identifiers
Jessie Myers Army Corps of Engineers
This resource belongs to the following collections:
Title Owners Sharing Status My Permission
USACE CWMS - Meramec Watershed Mayss Saadoon · Jason Sheeley · Adrian Christopher  Discoverable & Not Shareable Open Access
USACE CWMS - Illinois Watershed Mayss Saadoon · Jason Sheeley · Adrian Christopher  Discoverable & Not Shareable Open Access
USACE CWMS - Cuivre Watershed Mayss Saadoon · Jason Sheeley · Adrian Christopher  Discoverable & Not Shareable Open Access
USACE CWMS - Cache Watershed Mayss Saadoon · Adrian Christopher · Jason Sheeley  Discoverable & Not Shareable Open Access
Extended Metadata
Name Value
USACE Model Registry Point of contact: USACEModelRegistryAdmin@usace.army.mil


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