Search results for " Erosion"
showing 10 items of 356 documents
Stochastic assessment of climate impacts on hydrology and geomorphology of semiarid headwater basins using a physically-based model
2015
Hydrologic and geomorphic responses of watersheds to changes in climate are difficult to assess due to projection uncertainties and nonlinearity of the processes that are involved. Yet such assessments are increasingly needed and call for mechanistic approaches within a probabilistic framework. This study employs an integrated hydrology-geomorphology model, the Triangulated Irregular Network-based Real-time Integrated Basin Simulator (tRIBS)-Erosion, to analyze runoff and erosion sensitivity of seven semiarid headwater basins to projected climate conditions. The Advanced Weather Generator is used to produce two climate ensembles representative of the historic and future climate conditions f…
Climatic changes and coastal erosion in Sicily
2009
Medium-term shoreline evolution of the mediterranean coast of Andalusia (SW Spain)
2015
Coastal environment is a dynamic system in which numerous natural processes are continuously actuating and interacting among them. As a result, geomorphologic, physical and biological characteristics of coastal environments are constantly changing. Such dynamic balance is nowadays seriously threatened by the strong and increasing anthropic pressure that favors erosion processes, and the associated loss of environmental, ecologic and economic aspects. Sandy beaches are the most vulnerable environments in coastal areas. The aim of this work was to reconstruct the historical evolution of the Mediterranean coastline of Andalusia, Spain. The investigated area is about 500 km in length and includ…
MEASURING FIELD RILL ERODIBILITY BY A SIMPLIFIED METHOD
2016
Many process-oriented erosion prediction models reproduce rill erosion as affected by site-specific parameters, as for example, rill erodibility, and thus, their practical application requires the measurement of these parameters or their estimate. The aim of this paper was establishing a method for indirectly measuring field rill erodibility. A simple mathematical approach based on a known soil detachment equation and accounting for the rill erosion dynamic process is applied. Field measurements carried out for seven natural rainfall events occurring at the plots of the Sparacia experimental station, southern Italy, are used for indirectly measuring the rill erodibility of the investigated …
La vegetazione a protezione di processi di escavazione localizzata: risultati di uno studio sperimentale
2018
Diversi studi di letteratura mostrano come la vegetazione debba essere considerata un fattore chiave per analizzare i meccanismi di trasporto che si realizzano lungo un corso d’acqua naturale (Jarvela, 2002; Folkard, 2011). In particolare, la presenza di vegetazione sul fondo e/o sulle sponde del corso d’acqua contribuisce sia a stabilizzare i sedimenti che ad aumentare la resistenza al moto della corrente (Tsujimoto 1999; Nepf and Vivoni, 2000; Afzalimehr and Dey, 2009; Nepf, 2012), influenzando i processi di trasporto solido e i conseguenti fenomeni di erosione e di deposito lungo lo stesso corso d’acqua. In questo contesto, nel presente lavoro sono riportati alcuni risultati di uno studi…
MANAGING SUBTERRANEAN CLOVER, ANNUAL MEDIC AND VETCH FOR SICILIAN VINEYARD SUSTAINABILITY
2004
During 2005/2006 a vineyards, located in south-west of Sicily (37° 60’ N – 12° 30 E), were subjected to five different soil managements: “conventional” ( T ) soil management using up to eight soil plowing with a five furrow plow; natural cover cropping ( N ), vetch cover cropping ( V ) (Vicia sativa L.); subclover cover cropping ( S ) (trifolium subterraneum var. Clare); medic cover cropping ( M ) (medicago polymorpha var. Santiago). In the layer 0-25 cm, soil moisture, total N, NO3, NH4, and soil organic matter were determined. Fresh and dry biomass weight, and total nitrogen percentage were determined on nine one square meter subplots for each thesis. Soil erosion was measured, using a Ge…
Impact of Phychicatric Disorder Bulimia Nervosa on Oral Health
2021
Bulīmija un bulīmiska rakstura uzvedība ir vieni no zināmākajiem ēšanas traucējumiem visā pasaulē jau kopš Viduslaikiem.54 Vispārējo zināšanu trūkums par bulīmijas klīniskajām pazīmēm, simptomiem un ārstēšanu bulīmijas pacientiem varētu būt par iemeslu tam, ka tikai neliels procents šo pacientu tiek atpazīti zobārsta kabinetā.58 Regulāra ierosinātā vemšana izraisa zobu erozijas, kas ir nozīmīga bulīmiskās aktivitātes pazīme, ko novēro 90% bulīmijas pacientu. Zobārstam jāprot diagnosticēt bulīmiju un pielietot pareizu mutes dobuma profilakses un ārstēšanas algoritmu šiem pacientiem. Darba mērķis ir izpētīt, kā bulīmija ietekmē mutes dobuma veselību – īpaši zobu veselību un bulīmijas radītās …