Infiltration of water and its effects on soil erosion

a computational analysis pertaining to central Tunisia by Belgacem Tobbi

Written in English
Published: Pages: 182 Downloads: 40
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  • Soil erosion -- Tunisia -- Mathematical models.

Edition Notes

Statementby Belgacem Tobbi.
The Physical Object
Pagination182 leaves, bound :
Number of Pages182
ID Numbers
Open LibraryOL14280550M

Strong soil water repellency was detected from 0 cm to 3 cm soil depth underneath unburned tree canopies at both woodlands and its strength was not altered by burning. However, fire removal of litter exacerbated repellency effects on infiltration, runoff generation, and  › Home › Research Centers › SageSTEP › Publications › Articles ›   nutrient supply and cycling, soil erosion and sedimentation, and impacts on water quantity and quality, the vast majority of this research has overwhelmingly concentrated on the effects of wildfire rather than on the effects of low severity burns such as HR ://~/media/FDEC72BF5BBashx.   Terracing as a Measure of Soil Erosion Control and Its Effect on Improvement of Infiltration in Eroded Environment Marcin K. Widomski Lublin University of Technology Poland 1. Introduction Soil erosion by water is commonly recognized as the one of main reasons of land Erosion also tends to remove the lighter, smaller soil particles first (such as clay and silt), leaving fine and coarse sand behind. A combination of large amounts of fine sand and small amounts of clay at the surface means the soil tends to seal and set hard, which limits infiltration (water entering the soil).

  Soil erosion and nutrient depletion have been the major challenges in Ethiopia that adversely affect soil fertility and crop productivity. With the aim of curbing land degradation problems, efforts are underway on the implementation of soil and water conservation (SWC) practices. This research investigated the effects of SWC practices on soil properties and crop productivity in cultivated   The theory of infiltration. i: The infiltration equation and its solution. Soil science, – ↑ Darcy, H. (). Les Fontaines Publiques de la Ville de Dijon. Dalmont, Paris. ↑ Morel-Seytoux, H. and Khanji, J. (). Derivation of an equation of infiltration. Water Resources Research, – ↑ Poesen, J. and Ingelmo   Infiltration rate as affected by soil surface crusting caused by rainfall. In Callebaut, F., Gabriels, D., and De Boodt, M., editors, Assessment of soil surface crusting and sealing, pages – Flanders Research Centre for Soil Erosion and Conservation, Gent. ↑ Poesen, J. (). An imporved splash transport :// Soil water repellency, infiltration, and fire severity were evaluated at locations within a sagebrush-steppe ecosystem in southern Idaho, USA, after a 78, ha wildfire. Fire frequency in the sagebrush-steppe has increased dramatically in the last century due to the proliferation of introduced annual weeds. Wildfire in shrub-steppe can increase runoff and erosion by decreasing vegetation

  Objectives []. Chapter 1 Processes and Mechanics of Water Erosion summarizes the prevailing mechanical principles of processes related to soil erosion by water on hillslopes, such as infiltration, rainsplash detachment and transport, interrill detachment, particle transport, rill erosion, and sediment continuity.. Chapter 2 Soil Conservation Measures merely enumerates soil conservation [32] Soil water flux was negative (i.e., downward) at all depths in the control plot at the beginning of the snowmelt period (March 1–10), indicating that the wetting front had already reached the bottom of the soil profile due to the infiltration of rain and snowmelt water on February

Infiltration of water and its effects on soil erosion by Belgacem Tobbi Download PDF EPUB FB2

Infiltration rates were equal to\ud application rates when the soil profile was dry. Under\ud these conditions the potential gradient, which is the\ud main driving force for water transport, is high. As the\ud soil water content increases, the potential gradient\ud decreases and water movement is driven by gravity.\ud Runoff was assumed to Infiltration is the process of water entry into soil; it is the basic process supplying the soil root zone with water.

Infiltration as a process can be divided into two basic types: rain   Urban soil characteristics, especially soil physical properties, are subject to dramatic changes due to compaction by intensive human activities, which may cause frequent flood events during the rainy seasons.

The aim of this study was to explore the water infiltration characteristics of urban soils with different degrees of compaction and to determine the effects of infiltration on The principal types of soil erosion by water are splash erosion, sheet erosion, interrill erosion, rill erosion, gully erosion, landslides, and stream erosion.

Soil erosion has on-site and off-site effects. The on-site effects include loss of soil, loss of organic matter and nutrients, damage to growing crops, exposure of plant roots, and   EFFECTS OF SOIL AND WATER CONSERVATION TECHNIQUES ON SOIL PRODUCTIVITY AND BEAN GRAIN YIELD IN NYAMASHEKE DISTRICT, RWANDA Joas Tugizimana (BSc in Agricultural Engineering) AEA// A Thesis Submitted in Partial Fulfillment of the Requirements for the Degree of Master of soil and water.

Infiltration In the prior chapter, we considered water inputs to the soil and the ways in which those water inputs can be altered due to interception.

We also looked at the process of raindrop impact on the soil surface and its potentially harmful :// Soil erosion is the global soil degradation problem that causes significant environmental and socio-economic problems (Eswaran et al., ; Gomes de Souza et al., ;Ighodaro et al., ).

Effects of soil and water conservation on soil erosion reducing and crop production Existing literature and information shows that soil and water conservation practices such as terraces, mulching, cover crops, tree planting along contours can considerably reduce soil loss due to water erosion if they are well planned, correctly constructed  › Homepage › Catalog › Geography / Earth Science › Geology, Mineralogy, Soil Science.

Abstract. In this paper, we present and analyze a novel global database of soil infiltration measurements, the Soil Water Infiltration Global (SWIG) database.

In total, infiltration curves were collected across all continents in the SWIG database. These data were either provided and quality checked by the scientists who performed the experiments or they were digitized from published ://   Soil Erosion — Causes and Effects J.

Ritter, ORDER. AGDEX / OCTOBER (replaces OMAFRA Factsheet, Soil Erosion — Causes and Effects, Order No. ) Soil erosion is a naturally occurring process that affects all landforms.

In agriculture, soil erosion. refers to the wearing away of a field’s topsoil by   1. Introduction. Rainfall infiltration is a process that water runs into the soil and leads to an increased total moisture content, contributing to the variation of water partitioning and hydrologic response, and changes the development and recurrence frequency of erosion process (Lu et al.,Shakesby et al.,Walker et al., ).To better understand the hydrological and erosion In book: The Encyclopedia of Soil Science (pp) intensity effects soil properties, wind erosion, a poor surface condition that reduces the infiltration rate of water into the Soil water infiltration is a critical process in the soil water cycle and agricultural practices, especially when wastewater is used for irrigation.

Although research has been conducted to evaluate the changes in the physical and chemical characteristics of soils irrigated by treated wastewater, a quantitative analysis of the effects produced on the infiltration process is still :// A thorough look at physical properties of soil erosion Soil erosion has been responsible for billions of dollars of damage during the past thirty years, in the United States alone.

Soil Erosion provides complete coverage of the physical causes, processes, and effects of this environmental problem from its origins to planning for future conservation and ://?id=7YBaKZj0C.

J.E. Gilley, in Encyclopedia of Soils in the Environment, Introduction. Water erosion is caused by the detachment and transport of soil by rainfall, runoff, melting snow or ice, and irrigation. Excessive erosion can threaten the production of agricultural and forest products.

Erosion may also impact water conveyance and storage structures, and contribute to pollution from land :// It decreases the infiltration rate, reduces the available water at the root zone, increases runoff and soil erosion and affects seedlings and plant growth.

Duley () reported that raindrop impacts on the bare soil surface are the cause of such a low permeability :// P. Bullock, in Encyclopedia of Soils in the Environment, Soil Erosion. Soil erosion is the movement and transport of soil by various agents, particularly water, wind, and mass movement; hence climate is a key factor.

It has been recognized as a major problem since the s and, although there has been some 70 years of research into the causes and processes, it is still increasing and of   Biochar effects on soil water infiltration and erosion under seal formation conditions: rainfall simulation experiment May Journal of Soils and Sediments 16(12) Effects of Soil Erosion.

The major effects of soil erosion include: Loss of Arable Land. Soil erosion removes the top fertile layer of the soil. This layer is rich in the essential nutrients required by the plants and the soil.

The degraded soil does not support crop production and leads to low crop productivity. Clogging of Waterways Effects of antecedent soil water content on infiltration and erosion processes on loessial slopes under simulated rainfall.

effects on surface runoff and erosion under ://   Inherent Factors Affecting Soil Infiltration Inherent factors affecting soil infiltration, such as soil texture, Soil texture cannot be changed.

(percentage of sand, silt, and clay) is the major inherent factor affecting infiltration. Water moves more quickly through large pores of sandy soil than 2 days ago  Reduction of soil fertility; Repeated erosion washes away the topsoil.

The top soil is loaded with nutrients and organic matter critical for crop growth. Extensive erosion also minimizes the depth of soil available for water storage and rooting. Repeated erosion reduces water infiltration into the soil, which may result to withering of :// The protecting role of vegetation is the base for many erosion control, soil conservation, and rangeland management measures.

Vegetation cover reduces splash erosion due to interception of rainfall, decreases overland flow, and improves infiltration of precipitation and runoff water into the soil.

One example for such vegetation regeneration measures was documented by SFAP on the wide and flat Residue cover is widely used for soil conservation after crop harvesting in the black soil region of the Northeastern China, which influences infiltration.

It is necessary to optimize infiltration models for accurate predictions under bare and residue cover slope conditions. Rainfall simulation experiments were conducted to quantify the infiltration for the black soil under four rainfall   Infiltration is the process by which water on the ground surface enters the soil.

Infiltration is governed by two forces, gravity, and capillary action. While smaller pores offer greater (hydrology).htm. Strauss P, Klaghofer E () Effects of soil erosion on soil characteristics and productivity.

Bodenkultur-wien and munch EN – Google Scholar Strunk H () Soil degradation and overland flow as causes of gully erosion on mountain pastures and in ://   SOIL EROSION AND ITS EFFECTS J The loss of trees, which anchor the soil with their roots, causes widespread erosion throughout the tropics.

Only a minority of areas have good soils, which after clearing are quickly washed away by the heavy rains. As the suspended particles reach the ocean, the water becomes cloudy, causing At plot scale, contradictory results were derived regarding slope effects on infiltration (e.g., [17,18]) and soil erosion (e.g., [19,20]).

Besides, some researchers observed that runoff volume and soil loss on slopes increases with increasing slope angle till a critical slope angle of 20°–30° (e.g., [ 21 ]), while others reported that soil Abstract. Mulching and soil water content (SWC) have a significant impact on soil erosion, and this study investigated the effect of straw mulching on water infiltration and soil loss under different initial SWC treatments in a rainfall simulation experiment conducted in northern The effects of different rates of polyacrylamide - PAM (0,and kg ha-1) applied with a sprinkler using wastewater (electrical conductivity - EC of dS m-1) and freshwater (EC of dS m-1) on runoff, soil erosion and infiltration were studied in laboratory using a rainfall simulator.

Three different soil textures (sandy loam, loam, and silty clay loam) and three irrigations were. Integrating agricultural land uses is a suitable alternative for fostering economic development and improving food security. However, the effects of long-term integrated systems on soil erosion and water infiltration are still poorly understood.

Here, we investigate the influence of different agricultural land uses on soil erosion and water infiltration in an Oxisol site located in the The rainfall-runoff process (RRP) is an important part of hydrologic process. There is an effective measure to study RRP through artificial rainfall simulation.

This paper describes a study on three growing stages (jointing stage, tasseling stage, and mature stage) of spring maize in which simulated rainfall events were used to study the effects of various factors (rainfall intensity and slope However, under long-term managed vegetable fields of clay loam soil (Basher and Ross, ); most of the soil redistribution is caused by water erosion rather than tillage erosion.

On an equal-weight basis, the residues of small grains are more effective than those of sorghum or corn residues, which in turn are more effective than those of