Flood-frequency analysis for the Santa Ynez River and adjacent region, California
California ; Dam ; Flood ; Fluvial hydrology ; Hydraulic works ; Statistics ; Stream ; United States of America
A regional flood-frequency curve is presented for the Santa Ynez River and adjacent areas in southern California. This curve was developed to improve estimates of return periods for very extreme floods on the Santa Ynez River and to evaluate
the likelihood that Bradbury Dam, with its present spillway capacity of 4500cms, would be overstopped. The flood-frequency curve was fit using an index flood method and the assumption that floods in this region follow the log-Pearson Type III distribution.
The relationship of large volcanic eruption in the world and the summer drought/flood in China
China ; Drought ; Flood ; Precipitation ; Sichuan ; Statistics ; Summer ; Temperature ; Volcanic eruption ; Weather type
Based on data in the last 500 years for strong volcanic activity and the summer drought/flood types available in China, the statistical relations of the volcanic eruptions in seasons and several regions and the drought/flood types and grade index
of main regions in China have been investigated. The possible teleconnection between flood in the Yangtze River and the Haihe River valleys in 1991 and the volcanic eruption of Mt Pinatubo in June of 1991 has been also examined.
In this paper frequency distributions of low magnitude floods derived either from annual maxima (AMS) or from all peaks exceeding a selected threshold discharge are compared for ten gauging stations from the upper Vistula River drainage basin
The recent Lake Babati floods in semi-arid Tanzania. A response to changes in land cover?
Deforestation ; Flood ; Human impact ; Lake ; Photointerpretation ; Precipitation ; Semi-arid area ; Soil degradation ; Tanzania ; Water balance
This article reviews the two explanations for Lake Babati floods. Three methods were used: 1) compiling and analyzing relevant data on regional rainfall and Lake Babati levels; 2) developing a conceptual hydrological model of the catchment
Coarse-sediment distribution as evidence of an elevation limit for flash flooding, Bear Creek, Colorado
Altitude ; Carrying capacity ; Colorado ; Flood ; Fluvial hydrology ; Grain size distribution ; Meltwater ; Mountain ; Precipitation ; Snow ; United States of America
Measurements of coarse-grained channel sediment at 19 sites along the creek indicate a decrease in particle size in flood deposits with increasing elevation, as well as a decrease in the size of clasts introduced to the main channel along
Besides the measuring records, chronicles and old maps, the flood records are reflected in the slope and fluvial deposits and forms. We may distinguish several phases of increased fluvial activity connected with climatic variations and changes
in the land use. On the medieval forest clearence are superimposed heavy floods from the second half of XIth century and close of XIIIth century. Frequent floods from XV-XVIth century and snow melt floods of the Little Ice Age caused the shift
Australia ; Drought ; Flood ; Fluvial hydrology ; Hydrological regime ; New South Wales ; Precipitation ; River management ; Suspended load
The Upper Nepean Water Supply Scheme (4 large dams, 2 small dams and 2 diversion weirs) is outlined before secular rainfall changes in the Upper Nepean Catchment are discussed. The effects of flow regulation on flood frequency and flow duration
during FDRs (flood-dominated regimes) and DDRs (drought-dominated regimes) are then determined before quantifying the downstream reduction in sediment loads caused by impoundment. Lastly, the implications of the results for the environmmental streamflow
Channel geometry ; Discharge ; England ; Flood ; Floodplain ; Fluvial hydrology ; Methodology ; River management ; Stream flow ; United Kingdom
All river engineering schemes require flood discharge estimates as part of the design and appraisal process. Research on the interrelationship of stream channel geometry and river discharge has provided the basis for an indirect method of flood
Flood ; Floodplain ; Fluvial deposit ; Fluvial processes ; Grain size distribution ; Meuse ; Netherlands (The) ; Rhine ; River bed ; Sediment transport ; Suspended load
This paper presents the results of measurements of floodplain sedimentation using sediment traps. The study was carried out on two embanked floodplains along the Rivers Rhine and Meuse in the Netherlands during a 3 day flood in january 1993. Raster
Biogeography ; Colorado ; Ecosystem ; Flood ; Model ; Stream ; United States of America ; Vegetation ; Vegetation dynamics
This paper specifically examines the process of vegetation recovery following disturbance by exceptional natural floods along a river reach that is (and has been) comparatively undisturbed by human activities. It assesses a new successional model
China ; Delta ; Drought ; Flood ; Huang He ; Human impact ; Sediment transport ; Stream ; Stream flow ; Water resources ; Water use
This paper discusses the remarkable effect of flood discharge, unusual drought and strong storm surge on the evolution of the Yellow River delta and shows that in the study of deltas, greater attention should be paid to the rare events.
Australia ; Drought ; Flood ; Floodplain ; Fluvial hydrology ; Forecast ; Global change ; Greenhouse effect ; New South Wales ; River bed
The recognition of alternating flood- (FDRs) and drought-dominated regimes (DDRs) in coastal rivers of New South Wales has helped to explain some of the changes in channels and floodplains observed in more recent times. On these bases the aims
Arid area ; Carrying capacity ; Data base ; Flood ; Fluvial dynamics ; Grain size distribution ; Israel ; Negev ; Stream
The Nahal Yatir Bedload Transport Database arises from the Northern Negev River Sediment Monitoring Programme and represents the first body of bedload information to be collected during flash floods in desert gravel-bed streams. Bedload flux
Fire ; Flood ; Forest ; Geomorphology ; Hydrology ; Rill wash ; Soil erosion ; United States of America ; Vegetation ; Vegetation dynamics ; Virginia ; Watershed
Field investigations review selected parts of the study by Hack and Goodlett (1960). Replicate data provide a basis to evaluate interpretations of Hack and Goodlett, to document geomorphic change within the Little River Basin since the 1949 flood