Opportunities for incorporating geography into the river basin management
Aménagement hydraulique ; Bassin-versant ; Cours d'eau ; Développement durable ; Environnement ; Gestion de l'eau ; Hydrologie ; Ressource naturelle ; Slovénie ; Sotla
Geography in Slovenia is not sufficiently involved in the management of river basins, so the A. designed a model of geographical approach to integrated management of water resources presented on the example of the Sotla river basin. He considered
the river basin with its inner diversity and heterogeneity as a basic spatial unit of management. This approach would be a supplement to present sustainable strategies of water management and it could be applied by appropriate study programmes in geography
Diagnosis of river basins as CO2 sources or sinks subject to sediment movement
Bassin-versant ; Chine ; Dioxyde de carbone ; Ecosystème ; Erosion ; Flux ; Géochimie ; Huanghe ; Transport sédimentaire
This paper introduces a rule-of-thumb coordinate system based on sediment delivery ratio (SDR) and soil humin content (SHC) in order to evaluate the net effect of soil erosion, sediment transport and deposition on CO2 flux in river basins. The SDR
-SHC system delineates CO2 source and sink areas, and further divides the sink into strong and weaks areas according to the world-average line. The Yellow River Basin, most severely suffering soil erosion in the world, only appears to be a weak erosion
-induced CO2 sink in this system. the temporal analysis shows that the Yellow River Basin was once a source, but changed its role to become a weak sink in the past 40 years due to both anthropogenic and climatic influences. The spatial analysis identifies
the middle sub-basin as the main source region, and the lower as the main sink. For comparison, sediment-movement-related CO2 fluxes of 8 other major basins in 4 continents are examined.
Années 1951-2010 ; Bassin-versant ; Changement climatique ; Corrélation ; Cours d'eau ; Danube ; Hongrie ; Hydrologie fluviale ; Série chronologique ; Température de l'eau ; Tisza
Based on a 60-year long hydrological observation series from the Hungarian Hydrological Service (between 1951 and 2010), the monthly mean water temperatures of both largest rivers in the Carpathian Basin, the Danube and the Tisza were studied
in the paper. The monthly extremes in water temperatures were explained by the different climatic conditions in the drainage basins of the rivers : the Danube basin upstream its entrance to Hungarian territory with a marked Atlantic and the Tisza basin
An investigation of element ratios for assessing suspended-sediment sources in small agricultural basins
Bassin-versant ; Charge en suspension ; Etats-Unis ; Géochimie ; Kansas ; Sol cultivé ; Sédimentologie ; Traceur ; Transport sédimentaire
In this study, 253 element ratios were assessed to determine which, if any, were potentially useful for sediment-source determinations in 6 small agricultural basins in northeastern Kansas, USA. Samples of surface soils (cropland and grassland
soils for all 6 basins. The results show that additional research is needed to ascertain whether or not the use of Co/Pb and Co/Zn ratios as tracers is widely applicable or restricted to specific terrestrial environments.
China ; Climate ; Drought ; Mekong ; Precipitation ; Qinghai ; River basin ; Seasonal variation
Les AA. analysent les périodes de sécheresse du bassin fluvial du Lancang (Mékong) dans la province du Qinghai à partir de l’étude des précipitations des années 2006 et 2009. A l’échelle de un et de trois mois, les résultats s’avèrent pertinents en
Asie ; Bassin-versant ; Conflit ; Eau ; Energie hydraulique ; Gestion de l'eau ; Impact ; Mékong ; Projet ; Relations internationales ; Sécurité
On peut se demander si le rythme de plus en plus rapide du développement de l'hydro-électricité dans le bassin du Mékong menace l'intégrité du système hydrologique, en particulier en ce qui concerne les Etats du bassin inférieur, les plus dépendants
Spatial analysis of morphometric indices : the case of Bolu pull-apart basin, western section of North Anatolian Fault System, Turkey
This study defines the tectonic impact of the North Anatolian fault system (NAFS) on the evaluation and activity of the Bolu pull-apart basin using morphometric indices based on topographic maps. In this study, 3 indices including valley floor width
to height ratio (Vf), asymmetry factor (Af), and Stream Length Gradient Index (SL) are applied to the tectonic basin area. To detect the deviation from spatial randomness of applied indices, the weighted correlation coefficient Moran's I is used, and results
are interpreted at 99% confidence interval. According to the results, the tectonic impact of NAFS on the northern and western sides of the basin distinctly differs from one another. Clustered distribution of Vf and Af values on the southern side of the basin
margin reveals that this side of the basin margin is tectonically more deformed compared with the northern side.
Analyse de sensibilité ; Années 1960-2007 ; Bassin-versant ; Chine ; Donnée climatique ; Espace-temps ; Evapotranspiration ; Radiation ; Température ; Tendance du climat ; Vitesse du vent
This paper dealt with sensitivity of potentiel evapotranspiration (Eo) over China, which was divided into 10 drainage systems, including Songhua River basin, Liaohe River basin, Haihe River basin, Yellow River basin, Yangtze River basin, Pearl River
basin, Huaihe River drainage system, Southeast river drainage system, Northwest river drainage system and Southwest river drainage system. In addition, the calculation method of global radiation in Penman-Monteith formula was improved by optimization
Hydro-climatic trends in the last 50 years in the lower reach of the Shiyang River Basin, NW China
Action anthropique ; Analyse d'ondelettes ; Bassin-versant ; Chine ; Chine du Nord-Ouest ; Eau de fonte ; Hydroclimatologie ; Statistique ; Tendance du climat
The hydro-climatic trends were examined for the lower reach of the Shiyang River Basin in NW China using the wavelet analysis and the Mann–Kendall (M–K) test. The results showed that the discharge significantly decreased during the last 5 decades
, while there was no noticeable change in precipitation. A 26-year periodicity in discharge was identified by applying the global wavelet spectra and continuous wavelet transform (CWT) method. Because the Shiyang River Basin is located in the cold region
glacier and snow. However, the increasing water demand for the economic development and oasis expansion in the middle reach of the basin will reduce discharge flowing into the lower reach of the basin.
Le bassin de Boiano (Molise, Italie) a enregistré une importante sédimentation lacustre et fluvio-palustre depuis le Pléistocène moyen avec plusieurs niveaux de téphras intercalés. Les AA. détaillent ici l'évolution des environnements dans le bassin
entre les stades isotopiques de l'oxygène 13 et 2. Les dynamiques environnementales confirment l'appauvrissement graduel des forêts caducifoliées au Pléistocène moyen et décrivent plusieurs spécificités propres au bassin de Boiano. Quercus est ici peu
représenté et systématiquement associé à Fagus durant les interglaciaires. Le milieu, caractérisé par une humidité permanente, climatique ou édaphique, a favorisé la persistance de taxons hygrophiles. Le bassin de Boiano a donc pu constituer un refuge
écologique pour la flore arborée du Pléistocène moyen. La physiographie du bassin atténuait l'ampleur des dégradations climatiques lors des épisodes glaciaires.
bassins versants de Bafing Makana, Dakka Saidou et Sokotoro entre 1960 et 2000, dans la perspective d'une évaluation plus réaliste des ressources en eau. - (JPB)
China ; Fluvial hydrology ; Henan ; River basin ; Stream flow ; Watershed
Les AA. proposent l’analyse de la sensibilité du modèle hydrologique pour quantifier le niveau d’incertitude du bassin du fleuve Huaihe dans Henan. La méthode RSMSobol est la plus efficace en termes de coût et de pertinence que la méthode classique
Aeolian dust ; Aerosol ; Air mass ; Atmosphere ; Classification ; Eastern Europe ; Europe ; Interannual variability ; Pannonian Basin ; Pollution ; Sahara ; Satellite imagery ; Seasonal variation
In the study, the dust outbreaks from the Sahara toward the Carpathian Basin were examined on a daily basis from 1979 to 2009. Altogether 124 dust episodes were identified as Saharan dust intrusions in the investigated area and period, using
Résultats d’étude de la formation de l’écoulement hivernal dans les bassin-versants des cours d’eau : Dvina septentrional et Lovat. L’A. souligne l’existence de l’impact des températures sur les échanges de l’eau entre les partie supérieures et
Temporal and spatial variations and statistical models of extreme runoff in Huaihe River Basin during 1956–2010
Années 1956-2010 ; Bassin-versant ; Chine ; Crue ; Distribution statistique ; Ecoulement fluvial ; Huaihe ; Modèle ; Seuil ; Zone subtropicale
Based on the daily runoff data from 20 hydrological stations above the Bengbu Sluice in the Huaihe River Basin during 1956–2010, run test, trend test and Mann-Kendall test are used to analyze the variation trend of annual maximum runoff series
. Temporal and spatial variations of extreme runoff in the Huaihe River Basin are analyzed. The results show that during the period 1956–2010 in the Huaihe River Basin, annual maximum runoff at 10 stations have a decreasing trend, while the other 10 stations
have an unobvious increasing trend. The maximum runoff events almost occurred in the flood period during the 1960s and 1970s. The extreme runoff events in the Huaihe River Basin mainly occurred in the mainstream of the Huaihe River, Huainan mountainous
Basin (Apenninic foredeep) during the Late Pliocene and Early Pleistocene. Sedimentological and palaeocological data from 4 reference stratigraphic sections document an overall shallowing-upward tendency within Montesecco Clays, which is also confirmed
) contain a microfauna indicative of an outer circalittoral to infralittoral environment. As documented by previous subsurface data, the palaeoecological analysis suggests increasing depths in the Molise Periadriatic Basin from NW to SE. - (NF)
, and an increase of meltwater has resulted in changes of the annual water cycle in the Lijiang Basin and Hailuogou Basin. The increase amplitude of runoff in the downstream region of the glacial area is much stronger than that of precipitation, resulting from
the prominent increase of meltwater from glacier region in the 2 basins.
The crystalline complex of the Sopron Mts. at the eastern end of the Austroalpine nappe system and on the western rim of the Pannonian Basin is a key area to investigate the relationship of orogenic and extensional-rift structures that led
to the formation of the Pannonian Basin. The AA. focused primarily on the brittle and ductile deformations in 3 selected gneiss outcrops (Nádormagalast, Harka Hill, Kö Hill). Beyond providing evidence for the possible rotation and tilting of the different blocks
Agricultural land use ; Alluvium ; Foraminifera ; Geoarchaeology ; Geomorphology ; Holocene ; Human impact ; Palaeo-environment ; Pool ; Sedimentary basin ; Spain ; Valencia ; Valencian Community
The study area is the Bajo Segura Basin, located in the easternmost sector of the Betic Ranges. The AA. aim to correlate the geomorphological, sedimentological and micropaleontological data with archeological and geoarcheological information
of the Upper Holocene, particularly from the Bronze Age to the Middle Age. The geomorphological approach consists in the analysis of 6 mechanical cores and geoarcheological studies in several sites. During the Bronze Age, the Bajo Segura Basin was occupied