scholarly journals Effects of urbanization on streamflow and sediment transport in the Rock Creek and Anacostia River basins, Montgomery County, Maryland, 1962-74

1978 ◽  
Author(s):  
Thomas H. Yorke ◽  
William J. Herb
Keyword(s):  
Sediment Transport ◽  
River Basins ◽  
Montgomery County ◽  
Anacostia River

scholarly journals Distributed model of hydrological and sediment transport processes in large river basins in Southeast Asia

2015 ◽  
Vol 12 (7) ◽  
pp. 6755-6797 ◽  
Author(s):  
S. Zuliziana ◽  
K. Tanuma ◽  
C. Yoshimura ◽  
O. C. Saavedra
Keyword(s):  
Sediment Transport ◽  
Suspended Sediment ◽  
River Basin ◽  
River Basins ◽  
Large River ◽  
Mekong River ◽  
Distributed Model ◽  
Mekong River Basin ◽  
Chao Phraya River ◽  
Large River Basins

Abstract. Soil erosion and sediment transport have been modeled at several spatial and temporal scales, yet few models have been reported for large river basins (e.g., drainage areas > 100 000 km2). In this study, we propose a process-based distributed model for assessment of sediment transport at a large basin scale. A distributed hydrological model was coupled with a process-based distributed sediment transport model describing soil erosion and sedimentary processes at hillslope units and channels. The model was tested on two large river basins: the Chao Phraya River Basin (drainage area: 160 000 km2) and the Mekong River Basin (795 000 km2). The simulation over 10 years showed good agreement with the observed suspended sediment load in both basins. The average Nash–Sutcliffe efficiency (NSE) and average correlation coefficient (r) between the simulated and observed suspended sediment loads were 0.62 and 0.61, respectively, in the Chao Phraya River Basin except the lowland section. In the Mekong River Basin, the overall average NSE and r were 0.60 and 0.78, respectively. Sensitivity analysis indicated that suspended sediment load is sensitive to detachability by raindrop (k) in the Chao Phraya River Basin and to soil detachability over land (Kf) in the Mekong River Basin. Overall, the results suggest that the present model can be used to understand and simulate erosion and sediment transport in large river basins.

scholarly journals High Range Turbidity Monitoring in the Mu and Saru River Basins: All-year Monitoring of Hydrology and Suspended Sediment Transport in 2010

2012 ◽  
Vol 5 (1) ◽  
pp. 70-79 ◽  
Author(s):  
Takaaki ABE ◽  
Shigeru MIZUGAKI ◽  
Toshihito TOYABE ◽  
Masahiro MARUYAMA ◽  
Yasuhiro MURAKAMI ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Suspended Sediment ◽  
River Basins ◽  
Suspended Sediment Transport ◽  
High Range

scholarly journals Research of Impacts of the 2018 Hokkaido Eastern Iburi Earthquake on Sediment Transport in the Atsuma River Basin Using the SWAT Model

Water ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 356
Author(s):  
Yuechao Chen ◽  
Makoto Nakatsugawa ◽  
Hiroki Ohashi
Keyword(s):  
Sediment Transport ◽  
River Basin ◽  
Assessment Tool ◽  
Swat Model ◽  
River Basins ◽  
Efficiency Coefficient ◽  
Verification Period ◽  
The Impact ◽  
Water Assessment ◽  
Soil And Water

Landslides, debris flows, and other secondary disasters caused by earthquakes threaten the safety and stability of river basins. Earthquakes occur frequently in Japan. Therefore, it is necessary to study the impact of earthquakes on sediment transport in river basins. In this study, considering the influence of reservoirs, the Soil and Water Assessment Tool-calibration and uncertainty program (SWAT-CUP) was employed to analyze the runoff parameter sensitivity and to optimize the parameters. We manually corrected the sediment transport parameters after earthquake, using the Soil and Water Assessment Tool (SWAT) model to assess the process of runoff and sediment transport in the Atsuma River basin before and after the 2018 Hokkaido Eastern Iburi Earthquake. The applicability of the SWAT model to runoff simulation in the Atsuma River basin and the changes of sediment transport process after the earthquake were studied. The research results show that the SWAT model can accurately simulate the runoff process in the Atsuma River basin, the Nash–Sutcliffe efficiency coefficient (NSE) is 0.61 in the calibration period, and is 0.74 in the verification period. The sediment transport increased greatly after the earthquake and it is roughly estimated that the amount of sediment transport per unit rainfall increased from 3.5 tons/mm/year before the earthquake to 6.2 tons/mm/year after the earthquake.

An Approach to Mainstreaming Language-Disabled Children in the Elementary School

1978 ◽  
Vol 9 (1) ◽  
pp. 17-23
Author(s):  
Karen Navratil ◽  
Margie Petrasek
Keyword(s):  
Elementary School ◽  
Public Schools ◽  
Oral Language ◽  
School Age Children ◽  
Montgomery County ◽  
Elementary School Age ◽  
Language Classrooms ◽  
Language Pathology ◽  
General Goal ◽  
Resource Program

In 1972 a program was developed in Montgomery County Public Schools, Maryland, to provide daily resource remediation to elementary school-age children with language handicaps. In accord with the Maryland’s guidelines for language and speech disabilities, the general goal of the program was to provide remediation that enabled children with language problems to increase their abilities in the comprehension or production of oral language. Although self-contained language classrooms and itinerant speech-language pathology programs existed, the resource program was designed to fill a gap in the continuum of services provided by the speech and language department.

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