Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
Filter Total Items: 5584
Pesticides in ground water of the United States, 1992-1996 Pesticides in ground water of the United States, 1992-1996
During the first cycle of the National Water Quality Assessment (1992–1996), ground water in 20 of the nation's major hydro-logic basins was analyzed for 90 pesticide compounds (pesticides and degradates). One or more of the pesticide compounds examined were detected at 48.4% of the 2485 ground water sites sampled. However, approximately 70% of the sites where pesticides were detected...
Authors
Dana W. Kolpin, Jack E. Barbash, Robert J. Gilliom
Importance of the Mississippi River Basin for investigating agricultural–chemical contamination of the hydrologic cycle Importance of the Mississippi River Basin for investigating agricultural–chemical contamination of the hydrologic cycle
This special issue is devoted to recent and ongoing research relating to the fate and transport of agricultural chemicals in the Mississippi River Basin by the US Geological Survey Toxic Substances Hydrology (Toxics) Program. The Mississippi River Basin drains approximately 3 200 000 km2 representing 41% of the United States. This is the largest river in the United States and the third...
Authors
Dana W. Kolpin
Seed germination of two Everglades species, Cladium jamaicense and Typha domingensis Seed germination of two Everglades species, Cladium jamaicense and Typha domingensis
The germination requirements of Cladium jamaicense Crantz and Typha domingensis Pers. were studied under controlled conditions in the laboratory. Treatments included six temperature regimes, (constant temperatures of 15 20, 25, 30°C, and two fluctuating day : night temperature regimes of 25 : 10°C and 30 : 20°C), two light levels (14 : 10 h light : dark photoperiod and 24 h dark...
Authors
Bent Lorenzen, Hans Brix, Karen L. McKee, I.A. Mendelssohn, ShiLi Miao
Impact of storm-water outfalls on sediment quallity in corpus Christi Bay, Texas, USA Impact of storm-water outfalls on sediment quallity in corpus Christi Bay, Texas, USA
To determine the quality of sediments and extent of contaminant impacts, a Sediment Quality Triad (SQT) study was conducted at 36 sites in the Corpus Christi Bay, Texas, USA, system. Fifteen of the 36 sites were located near storm-water outfalls, but 13 other sites (i.e., industrial and domestic outfalls, oil field–produced water discharges, and dredging activity) and eight reference...
Authors
R. Scott Carr, Paul A. Montagna, James M. Biedenbach, Rick Kalke, Mahlon C. Kennicutt, Russell L. Hooten, Geraldine Cripe
Salt marsh die-back in coastal Louisiana Salt marsh die-back in coastal Louisiana
No abstract available.
Authors
E. Proffitt
Response of bird communities to natural disturbance Response of bird communities to natural disturbance
No abstract available.
Authors
Michael P. Guilfoyle, Wylie C. Barrow, Paul B. Hamel, James S. Wakely, Sammy L. King, T. J. Antrobus
Water quality Water quality
No abstract available.
Authors
Terry L. Maluk, Thomas A. Abrahamsen, Richard H. Day
Vertical accretion versus elevational adjustment in UK saltmarshes: An evaluation of alternative methodologies Vertical accretion versus elevational adjustment in UK saltmarshes: An evaluation of alternative methodologies
Simultaneous measurements of vertical accretion from marker horizons and marsh-elevation change from sedimentation-erosion tables (SET) were made in selected marshes along the East Anglian coast of the UK in order to address the following objectives: to ascertain the validity of treating accretion measurements obtained within tidally dominated, minerogenic saltmarshes as equivalent to...
Authors
Donald R. Cahoon, Jonathan R. French, Thomas Spencer, Denise Reed, Iris Moller
Development and implementation of the northeastern Gulf of Mexico characterization and data information management system and data transfer computer demonstration Development and implementation of the northeastern Gulf of Mexico characterization and data information management system and data transfer computer demonstration
No abstract available.
Authors
William R. Jones, Helena Schaefer
Northeastern Gulf of Mexico Coastal and Marine Ecosystem Program: Coastal Characterization: an overview and update Northeastern Gulf of Mexico Coastal and Marine Ecosystem Program: Coastal Characterization: an overview and update
The U.S. Geological Surveys Biological Resources Division (BRD) mission is to provide leadership in gathering, analyzing, and disseminating biological information as support for sound management of the Nation's natural resources. Since becoming operational in October of 1996 through the transfer of programs from various bureaus within the Department of the Interior, the BRD, in...
Authors
James B. Johnston, Lawrence R. Handley, William R. Jones, Steve Robb
Equations for estimating Clark unit-hydrograph parameters for small rural watersheds in Illinois Equations for estimating Clark unit-hydrograph parameters for small rural watersheds in Illinois
Equations for estimating the time of concentration (TC) and storage coefficient (R) of the Clark unit-hydrograph method were developed for small rural watersheds [0.02–2.3 square miles (mi2)] in Illinois. The equations will provide State and local engineers and planners with more accurate methods to estimate the TC and R for use in simulating discharge hydrographs on small rural...
Authors
Timothy D. Straub, Charles S. Melching, Kyle E. Kocher
Northeast Gulf of Mexico habitat mapping Northeast Gulf of Mexico habitat mapping
No abstract available.
Authors
L. R. Handley