NDLI: Encroachments in floodways of the Mississippi River and Tributaries Project

Content Provider	Springer Nature Link
Author	Lopez Llompart, Pilar Kondolf, G. Mathias
Copyright Year	2015
Abstract	The Mississippi River and Tributaries (MR&T) Project aims to protect the land within the lower Mississippi Valley from floods and to assure the navigability of the channel. One of the main flood risk mitigation features comprised in this project are floodways, or flood bypass channels, which divert excess flows in order to lower critical stages in the river. However, encroachments, i.e., buildings and other structures constructed within the floodways, can jeopardize their proper functioning and therefore compromise the functioning of the entire system. The presence of encroachments and resistance to flooding them delayed activation of the Birds Point-New Madrid Floodway in the flood of 2011. However, there has been no prior comprehensive study of encroachments on this and the West Atchafalaya floodways, the two largest in the MR&T system. Using historical maps and aerial imagery, we systematically measured the number, type, and spatial distribution of encroachments in the two floodways since the late 1960s. Encroachments in the Birds Point-New Madrid Floodway decreased by half, while the number of encroachments in the West Atchafalaya Floodway tripled, mainly concentrated along highways, such that they create linear bands of higher hydraulic resistance. The presence of encroachments clearly discourages use of the floodways from their designed purpose, but we are not aware of any studies that have analyzed whether the presence of these structures would measurably affect flow hydraulics through the floodways.
Starting Page	513
Ending Page	542
Page Count	30
File Format	PDF
ISSN	0921030X
Journal	Natural Hazards
Volume Number	81
Issue Number	1
e-ISSN	15730840
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-11-28
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Floodway Encroachment Mississippi River and Tributaries Project Birds Point-New Madrid Floodway West Atchafalaya Floodway Natural Hazards Hydrogeology Geophysics/Geodesy Geotechnical Engineering & Applied Earth Sciences Civil Engineering Environmental Management
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science Water Science and Technology

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Hydraulic modeling of the 2011 New Madrid Floodway activation: a case study on floodway activation controls

Comparison of the Birds Point-New Madrid Floodway, Mississippi River and the Yolo Bypass, Sacramento River

Anthropogenic effects and climate change threats on the flood diversion of Erchung Floodway in Tanshui River, northern Taiwan

Sociological aspects of natural hazards

Natural and anthropogenic hazards in the Yellow River Delta, China

Early warning systems for natural hazards and risks

Acknowledgment of reviewers ( Natural Hazards , Volume 77 , Issue 1 )

Acknowledgment of reviewers ( Natural Hazards , Volume 61 , Issue 3 )

Guest editorial: Paleotsunami

Encroachments in floodways of the Mississippi River and Tributaries Project

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