Search results for "REM"

Testing the Universal Soil Loss Equation-MB equation in plots in Central and South Italy

2019

Planning soil conservation strategies requires predictive techniques at event scale because a large percentage of soil loss over a long-time period is due to relatively few large storms. Considering runoff is expected to improve soil loss predictions and allows relation of the process-oriented approach with the empirical one, furthermore, the effects of detachment and transport on soil erosion processes can be distinguished by a runoff component. In this paper, the empirical model USLE-MB (USLE-M based), including a rainfall-runoff erosivity factor in which the event rainfall erosivity index EI30 of the Universal Soil Loss Equation (USLE) multiplies the runoff coefficient QR raised to an ex…

Measuring the USLE soil erodibility factor in the unit plots of Sparacia (southern Italy) experimental area

2022

The Universal Soil Loss Equation (USLE) is still widely used to predict soil loss by water erosion and to establish soil conservation measures. In this model, the soil erodibility factor K accounts for the susceptibility of the soil to be eroded due to the detachment and transport processes operated by the erosive agents. According to the USLE scheme, the K factor should be measured on unit plots, i.e., bare plots of given length (22 m) and steepness (9%) tilled along the maximum slope direction, but there is little evidence that there ever existed an actual unit plot between the plots used to develop the USLE. Given the difficulty in collecting sufficient data to adequately measure K, the …

Soil moisture retrieval using crop water stress indicators

2008

Assessing the performance of different model-based techniques to estimate water content in the upper soil layer

2016

he knowledge of soil water content (SWC) of the upper soil layer is important for most hydrological processes occurring over vegetated areas and under dry climate. Because direct field measurements of SWC are difficult, the use of different type of sensors and model-based approaches have been proposed and extensively used during the last decade. The main objective of this work is to assess the performance of two models estimating SWC of the upper soil layer: the transient line heat source method and the physically based Hydrus-1D model. The models' performance is assessed using field measurements acquired through a Time Domain Reflectometer (TDR). The experiment was carried out on an olive …

Regional Soil Moisture Retrieval Using Remotely Sensed Crop Water Stress Indicators

2011

Laudun-l'Ardoise (30), Excoutellier

2021

Le diagnostic de l’Excoutellier a permis de confirmer la présence d’un site protohistorique pointé dans les années 1990 par les prospections menées par le groupe archéologique de la vallée de La Tave et coordonnées par Hervé Petitot. Installée sur le flanc sud-ouest du plateau de Lacau, cette occupation de bas de pente se caractérise par quelques aménagements fossoyés associés à des structures de combustion. Un mobilier relativement riche (plus de 1600 fr. de céramique) permet d’envisager une mise en place de l’occupation à la toute fin de l’âge du Bronze, occupation qui dure probablement jusqu’aux premiers temps de l’âge du Fer. Malgré la mise en terrasses du secteur à la période moderne, …

La terre : un bien hors du commun. De l'utopie à la révolution foncière

2018

International audience; La terre manque toujours cruellement d'un droit à sa démesure. Indispensable à la plupart des activités humaines, cette ressource naturelle est saisie par un ensemble disparate de règles au prix, trop souvent, d'une négation de ses qualités. « À vouloir "forcer" la terre, écrivait Pisani, nous prenons, en effet, le risque de la voir se dérober »2. De là, un mal bien terrestre de notre société, qui affecte aussi bien la chose elle-même que ses habitants. Les symptômes portent les noms d'accaparement, d'artificialisation, de surexploitation, de dégradation. Ils sont suffisamment graves pour justifier la création d'un authentique système foncier, projet politique encore…

La educación formal colombiana analizada desde los valores de una ética cívica

2012

Colombia se define actualmente como un Estado Social de Derecho. Sin embargo atraviesa por un momento histórico que lo sitúa en un bajo quicio moral. Tal situación debe ser remediada desde la educación, comprendida en su sentido más amplio. La legislación así lo exige, pero su Modernidad Postergada no ofrece las garantías necesarias para que esa educación se brinde. Esta es la razón para hacerle un análisis al sistema educativo colombiano desde un planteamiento filosófico Moderno, como lo es la ética cívica o ética de mínimos de Adela Cortina. El cuestionamiento guía fue ¿Tiene Colombia, en su sistema formal de educación, condiciones adecuadas para llevar a cabo una educación para la autono…

miMic

2016

miMic, a sonic analogue of paper and pencil is proposed: An augmented microphone for vocal and gestural sonic sketching. Vocalizations are classified and interpreted as instances of sound models, which the user can play with by vocal and gestural control. The physical device is based on a modified microphone, with embedded inertial sensors and buttons. Sound models can be selected by vocal imitations that are automatically classified, and each model is mapped to vocal and gestural features for real-time control. With miMic, the sound designer can explore a vast sonic space and quickly produce expressive sonic sketches, which may be turned into sound prototypes by further adjustment of model…

Mapping soil water content under sparse vegetation and changeable sky conditions: comparison of two thermal inertia approaches

2013

A critical analysis of a thermal inertia approach to map surface soil water content on bare and sparsely vegetated soils by means of remotely sensed data is reported. The study area is an experimental field located in Barrax, Spain. In situ data were acquired within the Barrax 2011 research project. An advanced hyperspectral scanner airborne imager provides images in the visible/near-infrared and thermal infrared bands. Images were acquired both in day and night times by the Instituto Nacional de Técnica Aeroespacial between 12th and 13th of June 2011. The scene covers a corn irrigation pivot surrounded by bare soil, where a set of in situ data have been collected both previously and simult…