Next Article in Journal
Land Use/Cover Change Impacts on Water Table Change over 25 Years in a Desert-Oasis Transition Zone of the Heihe River Basin, China
Next Article in Special Issue
Implications of Texture and Erodibility for Sediment Retention in Receiving Basins of Coastal Louisiana Diversions
Previous Article in Journal
Comparison of Four Different Energy Balance Models for Estimating Evapotranspiration in the Midwestern United States
Previous Article in Special Issue
Identifying the Vulnerabilities of Working Coasts Supporting Critical Energy Infrastructure
Article

Evaluating Land Subsidence Rates and Their Implications for Land Loss in the Lower Mississippi River Basin

1
Department of Environmental Sciences, Louisiana State University, 1285 Energy, Coast & Environment Building, Louisiana State University, Baton Rouge, LA 70803, USA
2
Center for GeoInformatics, Louisiana State University, 200 Engineering Research & Development Building, Louisiana State University, Baton Rouge, LA 70803, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Richard Smardon
Water 2016, 8(1), 10; https://doi.org/10.3390/w8010010
Received: 5 November 2015 / Revised: 9 December 2015 / Accepted: 17 December 2015 / Published: 26 December 2015
High subsidence rates, along with eustatic sea-level change, sediment accumulation and shoreline erosion have led to widespread land loss and the deterioration of ecosystem health around the Lower Mississippi River Basin (LMRB). A proper evaluation of the spatial pattern of subsidence rates in the LMRB is the key to understanding the mechanisms of the submergence, estimating its potential impacts on land loss and the long-term sustainability of the region. Based on the subsidence rate data derived from benchmark surveys from 1922 to 1995, this paper constructed a subsidence rate surface for the region through the empirical Bayesian kriging (EBK) interpolation method. The results show that the subsidence rates in the region ranged from 1.7 to 29 mm/year, with an average rate of 9.4 mm/year. Subsidence rates increased from north to south as the outcome of both regional geophysical conditions and anthropogenic activities. Four areas of high subsidence rates were found, and they are located in Orleans, Jefferson, Terrebonne and Plaquemines parishes. A projection of future landscape loss using the interpolated subsidence rates reveals that areas below zero elevation in the LMRB will increase from 3.86% in 2004 to 19.79% in 2030 and 30.88% in 2050. This translates to a growing increase of areas that are vulnerable to land loss from 44.3 km2/year to 240.7 km2/year from 2011 to 2050. Under the same scenario, Lafourche, Plaquemines and Terrebonne parishes will experience serious loss of wetlands, whereas Orleans and Jefferson parishes will lose significant developed land, and Lafourche parish will endure severe loss of agriculture land. View Full-Text
Keywords: subsidence rates; Mississippi Delta; coastal Louisiana; land loss; sustainability; Bayesian kriging subsidence rates; Mississippi Delta; coastal Louisiana; land loss; sustainability; Bayesian kriging
Show Figures

Figure 1

MDPI and ACS Style

Zou, L.; Kent, J.; Lam, N.S.-N.; Cai, H.; Qiang, Y.; Li, K. Evaluating Land Subsidence Rates and Their Implications for Land Loss in the Lower Mississippi River Basin. Water 2016, 8, 10. https://doi.org/10.3390/w8010010

AMA Style

Zou L, Kent J, Lam NS-N, Cai H, Qiang Y, Li K. Evaluating Land Subsidence Rates and Their Implications for Land Loss in the Lower Mississippi River Basin. Water. 2016; 8(1):10. https://doi.org/10.3390/w8010010

Chicago/Turabian Style

Zou, Lei, Joshua Kent, Nina S.-N. Lam, Heng Cai, Yi Qiang, and Kenan Li. 2016. "Evaluating Land Subsidence Rates and Their Implications for Land Loss in the Lower Mississippi River Basin" Water 8, no. 1: 10. https://doi.org/10.3390/w8010010

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop