Rainfall distribution over the Indian Subcontinent during the 1987 and 1988 severe floods in Bangladesh
The rainfall distribution over the Indian Subcontinent during recent 2 severe floods (1987 and 1988) in Bangladesh was examined using daily station-based rainfall data, mainly from macro-scale view point. In both years, rainfall was abundant
in northeastern and northwestern part of Bangladesh and adjacent Indian Territory. This rainfall pattern was also obvious during and/or prior to the severe flood events in Bangladesh. Extreme high water level of the Ganges in 1987 and that of the Brahmaputra
in 1988 were caused under such rainfall distribution.
On the effect of uncertainty in spatial distribution of rainfall on catchment modelling
This paper demonstrates the effect of uncertainty in spatial estimates of rainfall on predictions of runoff volume, peak runoff and sediment yield. In particular, the effect of raingauge network density, spatial arrangement of individual raingauges
within the catchment, and spatio-temporal characteristics of rainfall events on model predictions is examined. This is achieved by applying a distributed runoff-erosion model to a 6.73 km2 catchment with a dense recording raingauge network in an area
dominated by convective air-mass rainfall events and infiltration-excess overland flow mechanisms.
Spatial, synoptic, and seasonal patterns of heavy rainfall in the southeastern United States
This paper examines the synoptic climatology and seasonality of heavy rainfall across the southeastern United States, in adopting a threshold approach. Frontal systems (particularly cold fronts) were found to be the dominant mechanism that induces
heavy rainfall across the study area, but tropical disturbances and air-mass storms also contribute, especially at the more coastal locations. Annual regimes were found to vary dramatically from one site to another, and 7 of the 8 sites investigated
Following the extreme rainfall event of 22 September 1992 in Southeastern France, an attempt was made to characterize the response of areas cultivated under vines to heavy precipitation. This response was determined in threeways by means of rainfall
simulation experiments. The infiltration rate is calculated as the difference between rainfall and runoff rates, the flow depths are measured to allow the flow hydraulics to be calculated and thirdly, sediment transport, both by splash and overland flow
Laboratory rainfall simulation experiments were conducted on a clay-rich kaolinitic oxisol from Hawai'i. The objectives of this study were: 1) to quantify wet-sieved aggregate ER-values for splash and wash transported sediment from a tropical oxisol
; 2) to assess temporal variations in aggregate ER-values for splash and wash under controlled rainfall conditions; 3) to determine the influence of slope angle on splash and wash ER-values.
The influence of rainfall on transport of beach sand by wind
This paper deals with the effect of rainfall on the process of wind erosion of beach sands and presents results from both field and wind tunnel experiments. The study was carried out using fine, well sorted beached sand of one particular beach
Runoff and infiltration were investigated on abandoned fields of patchy vegetation in semi-arid Spain during 15 months of natural rainfall and by rainfall simulations. The aim was to ascertain sources and sinks of runoff and the effects of soils
Agricultural practice ; Duricrust ; England ; Experimentation ; Geographical information system ; Micromorphology ; Photogrammetry ; Plant cover ; Rainfall simulation ; Soil ; Soil properties ; Splash ; United Kingdom ; West Sussex
The interactions between the spatial pattern of soil crust development and crop cover conditions are investigated through controlled laboratory experiments using rainfall simulation. The experimental responses are monitored by using terrestrial
Relationships between hail day frequency, altitude and latitude in the summer rainfall region of South Africa are investigated by means of generalised additive models. - (AJC)
Rainsplash is an important component of interrill erosion. An oxisol was used in laboratory rainfall experiments with 2 different antecedent moisture contents (AMC) and 10 different rainfall energy flux densities (EFD). The objectives were
Four large-scale rainfall simulation experiments were conducted in Spain, at 2 locations: El Ardal, (Murcia) and Majadillas, (Cuenca), to improve the understanding of the relationship between soil water dynamics, soil erosion and land degradation
moisture content was studied during rainfall in the laboratory. In order to evaluate the long-term effects of rainfall and sheet erosion on surface roughness of stony interrills, two abandoned hillslopes in southeastern Spain were investigated. Relations
This paper presents the spatial and temporal variations of sheet flow and sediment transport on an agricultural field under natural rainfall. The study site is located in western France (Rennes, Britany) where rainfall amount and intensity
Boulders in three small drainage bains of the Anza Borrego Desert were studied. The precipitation intensity and critical velocity of water flow required to move the boulders, relicts of the Pleistocene, were calculated. As the rainfall intensities
The aims of this paper are to describe the nature of the peat failures from this subantarctic environment, to examines the roles that rainfall and seimic activity play in their initiation, and to look at the longer term significance of these events
Measurements of temperature above and below ground, vapor pressure, radiation and rainfall revealed a drought which placed water stress on plants on this mountain in southeast Asia. The el niño event was possibly not the only cause of the drought
. The basins were grouped into 3 categories according to storm intensity to examine the relation between rainfall and erosion magnitudes. Slope-failure magnitudes and sediment yields are also affected by hillslope inclination. The effect of hillslope
The basic situation of the droughts and drought disasters are introduced briefly, and the main causes resulting in drought disasters are analysed in the paper. The lack of rainfall is one of the factors but not the real one. From environmmental