## Breadcrumb

-  Publications 
-  Reports 

#           Magnitude and frequency of floods in the Coastal Plain region of Louisiana, 2016      

      May 22, 2024    

View Document

XML Format

HTML Format

To improve flood-frequency estimates for rural streams in the Coastal Plain region of Louisiana, generalized least-squares regression techniques were used to relate corresponding annual exceedance probability streamflows for 211 streamgages in the region to a suite of explanatory variables that include physical, climatic, pedologic, and land-use characteristics of the streamgage drainage area. The resulting generalized least-squares models can be used to estimate selected annual exceedance probability streamflows for rural ungaged locations in the Coastal Plain region of Louisiana. For the 211 streamgages in the Coastal Plain region of Louisiana and surrounding States, annual peak-streamflow data available through the 2016 water year were used in this study. Two unique flood regions, the Mississippi Alluvial Plain and Coastal Plain, were identified as separate hydrologic regions based on statistical evaluation and significance of categorical variables representing the regions regressed against the 1-percent annual exceedance probability streamflow (the 100-year flood). Regional regression equations for estimating annual exceedance probability streamflow for the Mississippi Alluvial Plain region have been previously published; therefore, the purpose of this study was to generate updated regional regression equations for the Coastal Plain region of Louisiana. The final regression models used drainage area and channel slope as explanatory variables based on performance metrics.

## Citation Information

## Related Content

                  -              Data           
                  -              Connect           

February 8, 2023

####                 Flood-frequency of rural, non-tidal streams in Louisiana and parts of Arkansas, Mississippi, and Texas, 1877-2016              

Lower Mississippi-Gulf Water Science Center

January 1, 1994

####                 USGS Water Data for the Nation              

This collection provides access to water-resources data collected at approximately 1.5 million sites in all 50 States, the District of Columbia, Puerto Rico, the Virgin Islands, Guam, American Samoa and the Commonwealth of the Northern Mariana Islands. Online access to this data is organized around the categories surface water, groundwater, water quality, and water use.

#### Amanda R Whaling

##### Hydrologist

Lower Mississippi-Gulf Water Science Center

awhaling@usgs.gov

479-442-4888

## Related Content

February 8, 2023

####                 Flood-frequency of rural, non-tidal streams in Louisiana and parts of Arkansas, Mississippi, and Texas, 1877-2016              

Lower Mississippi-Gulf Water Science Center

January 1, 1994

####                 USGS Water Data for the Nation              

This collection provides access to water-resources data collected at approximately 1.5 million sites in all 50 States, the District of Columbia, Puerto Rico, the Virgin Islands, Guam, American Samoa and the Commonwealth of the Northern Mariana Islands. Online access to this data is organized around the categories surface water, groundwater, water quality, and water use.

#### Amanda R Whaling

##### Hydrologist

Lower Mississippi-Gulf Water Science Center

awhaling@usgs.gov

479-442-4888

### Study Area

### Contact

#### Lower Mississippi-Gulf Water Science Center - Nashville, TN Office

640 Grassmere Park DriveNashville, TN37211United States

GS-W-TNnsh Webmaster@usgs.gov

(615) 837-4700

(615) 837-4799 

### Explore Search

                  - United States
                  - Arkansas
                  -  Louisiana
                  -  Mississippi
                  -  Texas

View All **