The annual fluvial export of large wood (LW) was monitored by local reservoir management offices in Japan. LW export per unit watershed area was relatively high in small watersheds, peaked in intermediate watersheds, and decreased in large
watersheds. To explain these variations, the AA. surveyed the amount of LW with respect to channel morphology in 78 segments in the Nukabira River, northern Japan. They examined the differences in LW dynamics, including its recruitment, transport, storage
, and fragmentation and decay along the spectrum of watershed sizes. The AA. found that a large proportion of LW produced by forest dynamics and hillslope processes was retained because of the narrower valley floors and lower stream power in small watersheds. Although
A kinematic wave based watershed model for soil erosion and sediment yield
Geographical information system ; India ; Maharashtra ; Model ; Remote sensing ; Sediment budget ; Soil erosion ; Watershed
distributed model has been used for the estimation of soil erosion and sediment outflow by discretizing the watershed into small grids. The soil erosion and sediment outflow model has been developed and applied to Khadakohol watershed located in Nashik
Sediment budget for subalpine watersheds, Lake Tahoe, California, USA
Badland ; California ; Erosion ; Lithology ; Meltwater ; Mountain ; Sediment budget ; United States of America ; Watershed
presents the results of three-year study of spring snowmelt runoff in watersheds of Lake Tahoe, using a network of 9 nephelometric turbidometers. Highly eroded badland areas originating from volcanic mudflow parent material had high sediment yields
Experimental catchment ; Oklahoma ; Precipitation ; Soil moisture ; Spatial variation ; United States of America ; Watershed
The AA. analyze the temporal stability of soil moisture at the field and watershed scales in the Little Washita River Experimental Watershed (LWREW), as part of the remote sensing Cloud and Land Surface Interaction Campaign (CLASIC07) during June
the extent of correlation between surface soil moisture and profile soil moisture temporal stability analysis; and 3) analyze the temporal stability of soil moisture at the field and watershed scales to identify stations within the watershed, as well
as locations within each field, that were representative of the mean areal soil moisture content. In addition, the AA. compared their findings with those from past studies in the watershed under much drier conditions.
Impacts of urbanization on surface runoff of the Dardenne Creek watershed, St. Charles County, Missouri
Impact ; LANDSAT ; Land use ; Missouri ; Model ; Remote sensing ; Runoff ; United States of America ; Urbanization ; Watershed
St. Charles County, a suburb of St. Louis, Missouri, has undergone significant urban expansion in recent decades. Rapid urban sprawl in the Dardenne Creek watershed within the county has had a profound influence on surface runoff. The AA. examined
the patterns of land use/land cover (LULC) change in this watershed using Landsat TM/ETM+ imagery in 1982, 1987, 1991, 1999 and 2003. Calibrated with the observed hydrological data in 2003, a Long-Term Hydrologic Impact Assessment (L-THIA) model was used
to evaluate the effect of LULC change on surface runoff. Model simulations suggest >70% increase in average direct runoff in the watershed from 1982 to 2003, and the runoff increase is highly correlated with urban expansion.
Stream channel enlargment response to urban land cover in small coastal plain watersheds, North Carolina
Channel geometry ; Coastal plain ; Downcutting ; Fluvial erosion ; Grain size distribution ; Land use ; North Carolina ; Soil properties ; Stream ; United States of America ; Urbanization ; Watershed
The aim of the study was to characterize the effects of urban impervious area and associated stormwater runoff on the scaling of stream channel geometry and the associated grain size response with small Inner Coastal Plain watersheds in eastern
North Carolina. Urban expansion in the region began in the 1960s, with major urbanization occurring over the last 25 years. Channels draining urban watersheds are still responding to this land use change by downcutting and widening. Urban channel
Comparative study ; Conceptual model ; Geographical information system ; Hydrology ; Iran ; Model ; Precipitation ; Runoff ; Watershed
of equal linear reservoirs (Nash's model) which directly discharges to the watershed oulet through a linear channel. In the second UH model each sub-basin is represented as a linear reservoir arranged in a sequence based on the drainage network. Two
important properties of these three models are that they consider the effect of watershed geomorphology and include only one parameter which can be estimated using observed rainfall-runoff data. GIS tools are used for determining the watershed
geomorphological parameters. The results of these models are compared with the Nash's black box and the geomorphological SCS models for the Amameh watershed, Iran. Although the results show that the proposed models yield good efficiency in rainfall-runoff modeling
Time stability of soil water storage measured by neutron probe and the effects of calibration procedures in a small watershed
China ; Geophysics ; Land use ; Loess ; Organic materials ; Plateau ; Shaanxi ; Soil properties ; Soil water ; Spatial variation ; Vegetation ; Watershed
The knowledge of soil water storage (SWS) of soil profiles is crucial for the adoption of vegetation restoration practices. With the aim of identifying representative sites to obtain the mean SWS of a watershed, a time stability analysis of neutron
Gully erosion ; Hungary ; Rill wash ; Sediment transport ; Water erosion ; Watershed
The aim of the paper is to present an analysis on erosion and sedimentation in a hilly watershed, i.e. in the Tetves catchment, Hungary. At the outlet of the basin a sediment reservoir can be found which has been filled up completely. The authors
Flood ; Flood control ; Hungary ; Hydraulic works ; Hydrology ; River regime ; Stream ; Watershed
One of the greatest river regulation schemes of Europe was implemented in Hungary during the second half of 19th century. River control, flood protection and other human interventions on the watershed bought unambiguous and measurable changes
Clay ; Lacustrine sediment ; Land use ; Mercury ; Mississippi ; Pollution ; Reservoir ; Trace-element ; United States of America ; Water quality ; Watershed
Mercury accumulations in some fish species from Grenada Lake in north Mississippi exceed the Food and Drug Administration standards for human consumption. This study was conducted to characterize the distribution of total Hg in watershed soils
orders (Alfisols, Entisols, and Vertisols) found in the watersheds. The higher correlations for the lake sediment reflect an enrichment of the Hg-laden clay fraction relative to stream sediment through flocculation and sedimentation processes in the slack
The current denudation rate over an catchment area, encompassing the southern watershed of the Alps, the eastern watershed of the Northern Apennine and part of the Dinarides, was evaluated by means of a wide-reaching appraisal of the suspended load
Fire ; Grassland ; Gully erosion ; Idaho ; Infiltration ; Mountain ; Plant canopy ; Rainfall simulation ; Runoff ; Slope gradient ; Soil erosion ; Soil properties ; Steppe ; United States of America ; Vegetation dynamics ; Watershed
Experimental Watershed, Owyhee Mountains, southwestern Idaho, USA. Specific objectives were to quantify the relative contributions of runoff and erosion in rills and at small and large plot scales during concentrated-flow and rainfall simulations on burned
2009
[b1] U.S. Dep. of Agriculture - Agricultural Research Service, Northwest Watershed Research Center, Idaho, Boise, Etats-Unis