Assessment of low flow characteristics of the mississippi river
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Assessment of Low-Flow Characteristics of the Mississippi River. Research supported by the Met Council. Dave Lorenz USGS Water Science Center of Minnesota. Study Objective. Characterize the regional low flows in the Mississippi River above Anoka. Approach, Part 1.

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Assessment of Low-Flow Characteristics of the Mississippi River

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Assessment of low flow characteristics of the mississippi river

Assessment of Low-Flow Characteristics of the Mississippi River

Research supported by the Met Council

Dave Lorenz USGS Water Science Center of Minnesota


Study objective

Study Objective

Characterize the regional low flows in the Mississippi River above Anoka.


Approach part 1

Approach, Part 1

Low-flow duration statistics will be computed for the Miss. R. near Anoka, one upstream site (Grand Rapids), and three tributaries (Crow R., Crow Wing R., and Rum R.) as well as the headwaters reservoirs.

The basins were selected to represent broad subregions in the Miss. R. basin above Anoka.


Approach part 1 continued

Approach, Part 1, continued


Approach part 1 continued1

Approach, Part 1, continued

The lowest flows in the four subbasins will be examined to assess the likelihood of wide-spread drought compared to more localized droughts.

The statistics of the capacity of the headwaters reservoirs will be computed for the lowest flows in the Miss. R. near Anoka.


Approach part 2

Approach, Part 2

Synthetic flows will be computed by superimposing observed summer flows on observed snowmelt flows.


Approach part 2 continued

Approach, Part 2, continued


Approach part 21

Approach, Part 2

This analysis could provide the equivalent of 5,625 years of syntheitc flow values.

An estimate of the statistics of the lowest summer flows will be computed from the synthetic flows.

All of this is contingent upon consistent management of the reservoirs, observed behaviors of aquifers supplying water at low flow, and consistent climate patterns.


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