Discharge-sediment dynamics of lower Mississippi River
Conference
·
· AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States)
OSTI ID:6180725
Temporal and spatial variations of processes in the lower 315 mi (507 km) of the Mississippi River were investigated using a data base consisting of several instantaneous measurements of discharge, suspended sediment concentration, suspended sediment load, and percent sand in the suspended load. Data were collected periodically by the Corps of Engineers at Tarbet Landing (n = 460) between 1972 and 1985, at St. Francisville (n = 84) between 1977 and 1986, and at Belle Chasse (n = 93) between 1976 and 1986. Physical factors contributing to seasonal and annual variations in sediment load and concentration include the magnitude, duration, number, and timing of floods, and the background flow conditions. During high-flow years, sediment peaks precede discharge peaks by several months and depletion occurs during and after the maximum discharge. During low-flow years, sediment peaks occur only shortly before or coincide with discharge peaks. Unexplained sediment peaks during both falling and rising stages may be caused by bank failures or turbulent fluctuations of stream velocity.
- Research Organization:
- Louisiana Geological Survey, Baton Rouge (USA)
- OSTI ID:
- 6180725
- Report Number(s):
- CONF-8810362-
- Conference Information:
- Journal Name: AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States) Journal Volume: 72:9
- Country of Publication:
- United States
- Language:
- English
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