Rainfall changes and rainfall erosivity increase in the Algarve (Portugal)
There is evidence that, between hydrological years 1931/2 and 1990/1, rainfall changed in the Algarve. There was an annual rainfall increase (+9%) and a (7%) increase in rainfall during the rainy period (October to February). Both trends were
statistically confirmed by parametric and nonparamertric procedures. Rainfall erosivity and land degradation are related to rainfall regime. The Algarve's rainfall erosivity increase (+17%) was more pronounced than annual and seasonal rainfall changes.
The relationship between daily amounts of precipitation and rainfall intensity are examined over a 10 year period. Intensity is then related to soil erosivity, with was higher than predicted. - (AJC)
Rainfall parameters influencing erosivity in southeastern Nigeria
The objectives of the study were 1) to quantify the key physical properties of rainfall in southeastern Nigeria with more data input than had, hitherto, been used, 2) to estimate soil erosion risks in the area and 3) to provide a data base
This paper is an attempt to investigate temperature and rainfall data in 3 countries of the Middle East (Oman, Bahrain, and Sudan) to determine if any change has taken place in the weather conditions. The short term environmental impact of the Gulf
War has been included in the study. The study confirms that temperatures are rising and rainfall is decreasing in Oman and other two countries, leading to increasing desertification processes. A brief geographical discussion of Oman, Bahrain, and Sudan
precedes a detailed analysis of temperatures and rainfall regimen in all 3 countries.
This study presents results of microplot experiments with a rainfall simulator on soils of a small hydrologic catchment area in south-central Turkey. The objective was to establish the magnitude of the soil erodibility and infiltration variation
The effect of fire-induced surface heterogeneity on rainfall-runoff-erosion relationships in an eastern Mediterranean ecosystem, Israel
Rainfall simulation experiments were carried out on several plots at different times since the fire near Haifa, Israel. The results obtained show that the total runoff and sediment yield varied considerably in both space and time. High spatial
This paper first proposes a probabilistic approach of the relationship between rainfall amounts and degree of landsliding (Gallart, 1990) and then to apply it to a modification of the quantitative magnitude-frequency approach suggested by Wolman
and Miller (1960), extended it to the four main groups of geomorphic processes: chemical denudation, creep, water erosion and rainfall triggered landsliding, at the hillslope scale.
This paper contributes to the knowledge of the influence of fire and aspect on the hydrological and erosional response of soils in a typical Mediterranean environment. It presents measurements of soil aggregation parameters and rainfall simulation
Season of rainfall can be a major influence on the relative proportions of C3 and C4 grasses in a landscape, since their relative distribution is essentially constrained by temperatures during the growing season. The aim of this paper
was to investigate the nature and extent of C3/C4 vegetation shifts over the Late Quaternary, and thus obtain a record of the season of rainfall for the area surrounding Equus Cave in the northern Cape Province. 13C/12C ratios in tooth enamel carbonate of grazers
This paper presents field measurements of raindrop size distributions and relations between rainfall parameters that can be used in models for predicting soil erosion.
This initial laboratory study was carried out in a small flume, without rainfall, using sieved sand, and was designed primarily to test experimental methodology and to provide initial information on selective transport and deposition on smooth
Measurement of soil splash erosion on an event-based scale under natural rainfall was carried out on a field spot. Kinetic energy of precipitation was calculated according to a model that incorporates horizontal terminal velocities of raindrops