Geomorphic response to historic and ongoing human impacts in a large lowland river

被引:14
作者
Mossa, Joann [1 ]
Chen, Yin-Hsuen [1 ]
机构
[1] Univ Florida, Spatial & Temporal Anal Rivers STAR Lab, Dept Geog, Gainesville, FL 32611 USA
关键词
anthropogenic landforms; channel bed changes; channel migration; cutoffs; degradation; fluvial geomorphology; LOWER MISSISSIPPI RIVER; LOWER TRINITY RIVER; APALACHICOLA RIVER; SACRAMENTO RIVER; SUWANNEE RIVER; GRAND-CANYON; CONNECTIVITY; DOWNSTREAM; SEDIMENT; FLORIDA;
D O I
10.1002/esp.5334
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
Lowland coastal plain rivers are important for navigation and ecosystems, having unique concerns regarding water and sediment management. The Apalachicola River in Florida, the lower end of the ACF (Apalachicola-Chattahoochee-Flint) system, had historical modifications beginning in the 1800s. Most impacts are attributable to the Apalachicola Navigation Project in the latter half of the 20th century, which included dredging, disposal, rock and snag removal, artificial cutoffs, and wing-dike building. As one of few studies using paired hydrographic surveys over a long reach and time (170 km, 50 years), we defined four zones of bed elevation change between 1960 and 2010 based on the cumulative thalweg elevation plots. The river has four bed change zones: (1) uppermost, marked degradation from river mile (RM) 106 to 85 because of dam construction; (2) middle, minimal degradation from RM 85 to 34; (3) artificial cutoff zone, highest degradation, from RM 34 to 27; and (4) lowermost zone, aggradation from RM 27 to Apalachicola Bay because of upstream bed and bank sediment disturbances. Artificial cutoffs and lithology influence lateral migration, with rates being highest in cutoff zones and least in areas with some bedrock upstream and finer sediments downstream. Length changes from 1941 to 2019 are stable, except for the middle reach, which lengthened nearly 10%, and the lower non-tidal reach, where length shortened with cutoffs then regained in subsequent decades. Minimizing disturbance has led to 18% of the sand bar area revegetating since a decade of dredging ended. This framework helps in understanding historic and ongoing human activities, notably upstream water consumption, connectivity changes, sediment inputs, and climate change, that will affect the water and sediment management of the river, its floodplain, and bay, thus varying approaches for restoration.
引用
收藏
页码:1550 / 1569
页数:20
相关论文
共 133 条
[91]   Meander cutoffs nonlocally accelerate upstream and downstream migration and channel widening [J].
Schwenk, Jon ;
Foufoula-Georgiou, Efi .
GEOPHYSICAL RESEARCH LETTERS, 2016, 43 (24) :12437-12445
[92]  
SHIELDS FD, 1992, AQUAT CONSERV, V2, P145
[93]  
Skoog D.A., 2007, Principles of instrumental analysis, V6th, P1
[94]   The response of the Lower Mississippi River to river engineering [J].
Smith, LM ;
Winkley, BR .
ENGINEERING GEOLOGY, 1996, 45 (1-4) :433-455
[95]   Hydrological shifts and tree growth responses to river modification along the Apalachicola River, Florida [J].
Smith, Matthew C. ;
Stallins, J. Anthony ;
Maxwell, Justin T. ;
Van Dyke, Chris .
PHYSICAL GEOGRAPHY, 2013, 34 (06) :491-511
[96]   Geomorphic signature of a dammed Sandy River: The lower Trinity River downstream of Livingston Dam in Texas, USA [J].
Smith, Virginia B. ;
Mohrig, David .
GEOMORPHOLOGY, 2017, 297 :122-136
[97]   NEED FOR ECOSYSTEM MANAGEMENT OF LARGE RIVERS AND THEIR FLOODPLAINS [J].
SPARKS, RE .
BIOSCIENCE, 1995, 45 (03) :168-182
[98]   BIOGEOMORPHIC CHARACTERIZATION OF FLOODPLAIN FOREST CHANGE IN RESPONSE TO REDUCED FLOWS ALONG THE APALACHICOLA RIVER, FLORIDA [J].
Stallins, J. Anthony ;
Nesius, Michael ;
Smith, Matt ;
Watson, Kelly .
RIVER RESEARCH AND APPLICATIONS, 2010, 26 (03) :242-260
[99]   River meandering as a self-organization process [J].
Stolum, HH .
SCIENCE, 1996, 271 (5256) :1710-1713
[100]   Recent advances in life history of Gulf of Mexico sturgeon, Acipenser oxyrinchus desotoi, in the Suwannee river, Florida, USA:: a synopsis [J].
Sulak, KJ ;
Clugston, JP .
JOURNAL OF APPLIED ICHTHYOLOGY-ZEITSCHRIFT FUR ANGEWANDTE ICHTHYOLOGIE, 1999, 15 (4-5) :116-128