Éditeur(s) : Autoridad del Canal de Panama´ Autoridad del Canal de Panamá Autoridad del Canal de Panama´ ( Balboa Anco´n Repu´blica de Panama´ ) Autoridad del Canal de Panamá ( Balboa Ancón República de Panamá )
Résumé : (Statement of Responsibility) ACP, Autoridad del Canal de Panamá.
(Dates or Sequential Designation) Vol. 1, no. 1 (14 de enero de 2000)-
Title from caption.
Latest issue consulted: Vol. 5, no. 5 (del 5 al 18 de marzo de 2004).
Panama Canal (Panama)
Panama Canal Watershed (Panama)

43628926
00240269

Éditeur(s) : HAL CCSD Société géologique de France
Résumé : U-Pb ages obtained from detrital zircon from terrigenous sediments are used to determine the sources. Present fluvial sand-bars of the Ogooue river yield age spectra of detrital zircons in agreement with Archean and Early Proterozoic Sources found in the drainage. The large proportion of Late Proterozoic zircons cannot be derived from primary erosion of the watershed basement rocks, since there is no formation of that age in the area. This later group of zircons is in good agreement with reworking of the aeolian Paleogene Bateke Sands, by regressive erosion in the upper reaches of the Ogooue river, as they contain a majority of Late Proterozoic age zircons. The sources of Late Proterozoic zircons in the Bateke Sand are very distant, and transported and reworked - at least in part - by aeolian processes. Our results, together with the widely distributed Paleogene sediments over continental Africa, suggests that Paleogene was it time of subdued erosion of the cratonic areas and extensive reworking, transport and deposition within continental Africa. In contrast, our results from the Ogooue river indicate active present incision of the cratonic area, erosion of the previous continental sediments, and export of the river bed-load to the continental margin. This temporal evolution of erosion-transport-deposition is correlated with the drastic climate change that occurred during the Cenozoic, leading to a more efficient mechanical erosion, and it correlates with the increase of terrigenous flux to the margin, observed during the Neogene.
EISSN: 1777-5817

hal-00411165
https://hal.archives-ouvertes.fr/hal-00411165
DOI : 10.2113/gssgfbull.179.1.29

Éditeur(s) : Autoridad del Canal de Panamá Autoridad del Canal de Panamá ( Balboa, Ancón, República de Panamá )
Résumé : (Dates or Sequential Designation) Vol. 1, no. 1 (14 de enero de 2000)-
Title from caption.
Latest issue consulted: Vol. 5, no. 5 (del 5 al 18 de marzo de 2004).
(Statement of Responsibility) ACP, Autoridad del Canal de Panamá.
Panama Canal (Panama)
Panama Canal Watershed (Panama)

43628926
00240269

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
Big storm events represent a major risk for populations and infrastructures settled on coastal lowlands. In the Western Mediterranean, where human societies colonized and occupied the coastal areas since the Ancient times, the variability of storm activity for the past three millennia was investigated with a multi-proxy sedimentological and geochemical study from a lagoonal sequence. Mappings of the geochemistry and magnetic susceptibility of detrital sources in the watershed of the lagoon and from the coastal barriers were undertaken in order to track the terrestrial or coastal/marine origin of sediments deposited into the lagoon. The multi-proxy analysis shows that coarser material, low magnetic susceptibility, and high strontium content characterize the sedimentological signature of the paleostorm levels identified in the lagoonal sequence. A comparison with North Atlantic and Western Mediterranean paleoclimate proxies shows that the phases of high storm activity occurred during cold periods, suggesting a climatically-controlled mechanism for the occurrence of these storm periods. Besides, an in-phase storm activity pattern is found between the Western Mediterranean and Northern Europe. Spectral analyses performed on the Sr content revealed a new 270-year solar-driven pattern of storm cyclicity. For the last 3000 years, this 270-year cycle defines a succession of ten major storm periods (SP) with a mean duration of 96 ± 54 yr. Periods of higher storm activity are recorded from >680 to 560 cal yr BC (SP10, end of the Iron Age Cold Period), from 140 to 820 cal yr AD (SP7 to SP5) with a climax of storminess between 400 and 800 cal yr AD (Dark Ages Cold Period), and from 1230 to >1800 cal yr AD (SP3 to SP1, Little Ice Age). Periods of low storm activity occurred from 560 cal yr BC to 140 cal yr AD (SP9 and SP8, Roman Warm Period) and from 820 to 1230 cal yr AD (SP4, Medieval Warm Period).
ISSN: 0277-3791

hal-01277796
https://hal.archives-ouvertes.fr/hal-01277796
DOI : 10.1016/j.quascirev.2015.10.009

Éditeur(s) : Autoridad del Canal de Panama´ Autoridad del Canal de Panamá Autoridad del Canal de Panama´ ( Balboa Anco´n Repu´blica de Panama´ ) Autoridad del Canal de Panamá ( Balboa Ancón República de Panamá )
Résumé : (Statement of Responsibility) ACP, Autoridad del Canal de Panamá.
(Dates or Sequential Designation) Vol. 1, no. 1 (14 de enero de 2000)-
Title from caption.
Latest issue consulted: Vol. 5, no. 5 (del 5 al 18 de marzo de 2004).
Panama Canal (Panama)
Panama Canal Watershed (Panama)

43628926
00240269

Éditeur(s) : Autoridad del Canal de Panamá Autoridad del Canal de Panamá ( Balboa, Ancón, República de Panamá )
Résumé : (Dates or Sequential Designation) Vol. 1, no. 1 (14 de enero de 2000)-
Title from caption.
Latest issue consulted: Vol. 5, no. 5 (del 5 al 18 de marzo de 2004).
(Statement of Responsibility) ACP, Autoridad del Canal de Panamá.
Panama Canal (Panama)
Panama Canal Watershed (Panama)

43628926
00240269

Éditeur(s) : Autoridad del Canal de Panamá Autoridad del Canal de Panamá ( Balboa, Ancón, República de Panamá )
Résumé : (Dates or Sequential Designation) Vol. 1, no. 1 (14 de enero de 2000)-
Title from caption.
Latest issue consulted: Vol. 5, no. 5 (del 5 al 18 de marzo de 2004).
(Statement of Responsibility) ACP, Autoridad del Canal de Panamá.
Panama Canal (Panama)
Panama Canal Watershed (Panama)

43628926
00240269

Éditeur(s) : Autoridad del Canal de Panama´ Autoridad del Canal de Panamá Autoridad del Canal de Panama´ ( Balboa Anco´n Repu´blica de Panama´ ) Autoridad del Canal de Panamá ( Balboa Ancón República de Panamá )
Résumé : (Statement of Responsibility) ACP, Autoridad del Canal de Panamá.
(Dates or Sequential Designation) Vol. 1, no. 1 (14 de enero de 2000)-
Title from caption.
Latest issue consulted: Vol. 5, no. 5 (del 5 al 18 de marzo de 2004).
Panama Canal (Panama)
Panama Canal Watershed (Panama)

43628926
00240269

Éditeur(s) : HAL CCSD
Résumé : The evolution of mountain belt piedmont is controlled by interactions between tectonics, erosion and sedimentation. To study coupling between these processes, we analyze morphometric data collected in the eastern Tian Shan piedmont (NW China) and develop a new analogue modelling technique. The modeling approach uses an experimental set-up and analog material specifically designed to study simultaneously tectonic structures (faults, folds), detailed morphology (drainage basins, channels, alluvial fans, etc.) and stratified sedimentation. Measurement techniques based on laser interferometry and image correlation are also developed to quantify the topographic and kinematic evolution of models.
Our experiments allow a new approach for the study of piedmont morphotectonic evolution. Our results indicate that tectonics mainly controls this evolution. The propagation of deformation and the formation of relief both significantly influence the development of drainage networks, the evolution of drainage basins and the formation of morphotectonic markers. Particularly, a study of alluvial fans and watershed metrics suggests that there is a dynamical equilibrium between uplift, erosion and morphology. In addition, our results show that terrace nucleation is controlled by thrust activity and hydrography adjustments. Folding of terraces responds to a homothetic deformation pattern.
This new methodology brings promising perspectives in the fields of geomorphology, seismotectonics and sedimentology.
L'évolution d'un piémont de chaîne de montagnes est contrôlée par les interactions entre la tectonique, l'érosion et la sédimentation. Pour étudier ces processus, nous avons analysé des données morphométriques issues des piémonts orientaux du Tian Shan (NW Chine) et développé un nouveau type de modélisation analogique. Cette approche utilise un dispositif et un matériau expérimental spécialement conçus pour modéliser simultanément des structures tectoniques (failles, plis), une morphologie détaillée (bassins versants, rivières, cônes alluviaux, etc.) et une sédimentation stratifiée. Des techniques de mesure optique ont été également mises en oeuvre afin de quantifier l'évolution topographique et cinématique des modèles.
Les expériences réalisées offrent une opportunité inédite d'étudier l'évolution morphotectonique d'un piémont. Nos résultats montrent que la tectonique exerce un contrôle de premier ordre sur cette évolution. La propagation de la déformation et la formation des reliefs influencent en effet significativement le développement du réseau de drainage, l'évolution des bassins versants et la formation des marqueurs morphotectoniques. En particulier, l'analyse de la morphométrie des cônes alluviaux et de leurs bassins versants suggère qu'un équilibre dynamique s'installe entre la surrection, l'érosion et la morphologie. Nos résultats montrent également que l'apparition des terrasses est guidée par l'activité des chevauchements et les adaptations de l'hydrographie. Leur modèle de plissement répond à une déformation homothétique.
Cette nouvelle approche ouvre des perspectives d'étude prometteuses en géomorphologie, sismotectonique et stratigraphie.
https://tel.archives-ouvertes.fr/tel-00339145

tel-00339145
https://tel.archives-ouvertes.fr/tel-00339145
https://tel.archives-ouvertes.fr/tel-00339145v2/document
https://tel.archives-ouvertes.fr/tel-00339145/file/These_Graveleau08.pdf

Éditeur(s) : Autoridad del Canal de Panama´ Autoridad del Canal de Panamá Autoridad del Canal de Panama´ ( Balboa Anco´n Repu´blica de Panama´ ) Autoridad del Canal de Panamá ( Balboa Ancón República de Panamá )
Résumé : (Statement of Responsibility) ACP, Autoridad del Canal de Panamá.
(Dates or Sequential Designation) Vol. 1, no. 1 (14 de enero de 2000)-
Title from caption.
Latest issue consulted: Vol. 5, no. 5 (del 5 al 18 de marzo de 2004).
Panama Canal (Panama)
Panama Canal Watershed (Panama)

43628926
00240269

Éditeur(s) : Autoridad del Canal de Panama´ Autoridad del Canal de Panamá Autoridad del Canal de Panama´ ( Balboa Anco´n Repu´blica de Panama´ ) Autoridad del Canal de Panamá ( Balboa Ancón República de Panamá )
Résumé : (Statement of Responsibility) ACP, Autoridad del Canal de Panamá.
(Dates or Sequential Designation) Vol. 1, no. 1 (14 de enero de 2000)-
Title from caption.
Latest issue consulted: Vol. 5, no. 5 (del 5 al 18 de marzo de 2004).
Panama Canal (Panama)
Panama Canal Watershed (Panama)

43628926
00240269

Éditeur(s) : Autoridad del Canal de Panama´ Autoridad del Canal de Panamá Autoridad del Canal de Panama´ ( Balboa Anco´n Repu´blica de Panama´ ) Autoridad del Canal de Panamá ( Balboa Ancón República de Panamá )
Résumé : (Statement of Responsibility) ACP, Autoridad del Canal de Panamá.
(Dates or Sequential Designation) Vol. 1, no. 1 (14 de enero de 2000)-
Title from caption.
Latest issue consulted: Vol. 5, no. 5 (del 5 al 18 de marzo de 2004).
Panama Canal (Panama)
Panama Canal Watershed (Panama)

43628926
00240269

Éditeur(s) : Autoridad del Canal de Panama´ Autoridad del Canal de Panamá Autoridad del Canal de Panama´ ( Balboa Anco´n Repu´blica de Panama´ ) Autoridad del Canal de Panamá ( Balboa Ancón República de Panamá )
Résumé : (Statement of Responsibility) ACP, Autoridad del Canal de Panamá.
(Dates or Sequential Designation) Vol. 1, no. 1 (14 de enero de 2000)-
Title from caption.
Latest issue consulted: Vol. 5, no. 5 (del 5 al 18 de marzo de 2004).
Panama Canal (Panama)
Panama Canal Watershed (Panama)

43628926
00240269

Éditeur(s) : Autoridad del Canal de Panama´ Autoridad del Canal de Panamá Autoridad del Canal de Panama´ ( Balboa Anco´n Repu´blica de Panama´ ) Autoridad del Canal de Panamá ( Balboa Ancón República de Panamá )
Résumé : (Statement of Responsibility) ACP, Autoridad del Canal de Panamá.
(Dates or Sequential Designation) Vol. 1, no. 1 (14 de enero de 2000)-
Title from caption.
Latest issue consulted: Vol. 5, no. 5 (del 5 al 18 de marzo de 2004).
Panama Canal (Panama)
Panama Canal Watershed (Panama)

43628926
00240269

Éditeur(s) : Autoridad del Canal de Panama´ Autoridad del Canal de Panamá Autoridad del Canal de Panama´ ( Balboa Anco´n Repu´blica de Panama´ ) Autoridad del Canal de Panamá ( Balboa Ancón República de Panamá )
Résumé : (Statement of Responsibility) ACP, Autoridad del Canal de Panamá.
(Dates or Sequential Designation) Vol. 1, no. 1 (14 de enero de 2000)-
Title from caption.
Latest issue consulted: Vol. 5, no. 5 (del 5 al 18 de marzo de 2004).
Panama Canal (Panama)
Panama Canal Watershed (Panama)

43628926
00240269

Éditeur(s) : Autoridad del Canal de Panama´ Autoridad del Canal de Panamá Autoridad del Canal de Panama´ ( Balboa Anco´n Repu´blica de Panama´ ) Autoridad del Canal de Panamá ( Balboa Ancón República de Panamá )
Résumé : (Statement of Responsibility) ACP, Autoridad del Canal de Panamá.
(Dates or Sequential Designation) Vol. 1, no. 1 (14 de enero de 2000)-
Title from caption.
Latest issue consulted: Vol. 5, no. 5 (del 5 al 18 de marzo de 2004).
Panama Canal (Panama)
Panama Canal Watershed (Panama)

43628926
00240269

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
A new portable sampling system was developed to extract Radium isotopes from large volumes (up to 300 L) of fresh surface- and ground-waters of low Ra-activities (<5 mBq/L). Ra is quantitatively adsorbed on a small amount (6.5 g) of MnO2-coated acrylic fibers, which are then dried and burned at 600 °C in the laboratory. The resulting Mn-oxide powder (about 2 cm3 when compacted) is then analyzed through gamma-ray spectrometry which allows measurement of the whole Ra quartet (226Ra, 228Ra, 224Ra and 223Ra) in a single counting of a few days. The usual relative standard combined uncertainties (1σ) are 2–3% for 226Ra, 228Ra and 224Ra; and less than 10% for 223Ra. This method was applied to the analysis of Ra in karstic waters of the Lez aquifer, and surface- and ground-waters of the upper and middle Vidourle watershed (South of France). The analyzed waters have relatively low 226Ra activities (1–4 mBq/L) in both cases, regardless of the contrasted geology (Mesozoic limestone vs crystalline Variscan basement), but clearly distinct (228Ra/226Ra) ratios in agreement with the differences in Th/U ratios of the two drained areas. Short-lived Ra isotopes (224Ra and 223Ra) appear to be mainly influenced by near-surface desorption/recoil processes for most of the sampling sites.
ISSN: 0969-8043

hal-01491281
https://hal.archives-ouvertes.fr/hal-01491281
DOI : 10.1016/j.apradiso.2016.12.010

Éditeur(s) : Autoridad del Canal de Panama´ Autoridad del Canal de Panamá Autoridad del Canal de Panama´ ( Balboa Anco´n Repu´blica de Panama´ ) Autoridad del Canal de Panamá ( Balboa Ancón República de Panamá )
Résumé : (Statement of Responsibility) ACP, Autoridad del Canal de Panamá.
(Dates or Sequential Designation) Vol. 1, no. 1 (14 de enero de 2000)-
Title from caption.
Latest issue consulted: Vol. 5, no. 5 (del 5 al 18 de marzo de 2004).
Panama Canal (Panama)
Panama Canal Watershed (Panama)

43628926
00240269

Éditeur(s) : HAL CCSD IWA Publishing
Résumé : International audience
The widely occurring degradation product aminomethylphosphonic acid (AMPA) is a result of glyphosate and amino-polyphosphonate degradation. Massive use of the parent compounds leads to the ubiquity of AMPA in the environment, and particularly in water. The purpose of this review is to summarize and discuss current insights into AMPA formation, transport, persistence and toxicity. In agricultural soils, AMPA is concentrated in the topsoil, and degrades slowly in most soils. It can reach shallow groundwater, but rarely managed to enter deep groundwater. AMPA is strongly adsorbed to soil particles and moves with the particles towards the stream in rainfall runoff. In urban areas, AMPA comes from phosphonates and glyphosate in wastewater. It is commonly found at the outlets of Wastewater Treatment Plants (WWTP). Sediments tend to accumulate AMPA, where it may be biodegraded. Airborne AMPA is not negligible, but does wash-out with heavy rainfall. AMPA is reported to be persistent and can be biologically degraded in soils and sediments. Limited photodegradation in waters exists. AMPA mainly has its sources in agricultural leachates, and urban wastewater effluents. The domestic contribution to urban loads is negligible. There is a critical lack of epidemiological data - especially on water exposure - to understand the toxicological effects, if any, of AMPA on humans. Fortunately, well operated water treatment plants remove a significant proportion of the AMPA from water, even though there are not sufficient regulatory limits for metabolites.
ISSN: 0043-1354

hal-01516026
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01516026
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01516026/document
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01516026/file/Grandcoin%20et%20al.%20-%20AminoMethylPhosphonic%20acid%20%28AMPA%29%20in%20natural%20water.pdf
DOI : 10.1016/j.watres.2017.03.055

Éditeur(s) : Autoridad del Canal de Panama´ Autoridad del Canal de Panamá Autoridad del Canal de Panama´ ( Balboa Anco´n Repu´blica de Panama´ ) Autoridad del Canal de Panamá ( Balboa Ancón República de Panamá )
Résumé : (Statement of Responsibility) ACP, Autoridad del Canal de Panamá.
(Dates or Sequential Designation) Vol. 1, no. 1 (14 de enero de 2000)-
Title from caption.
Latest issue consulted: Vol. 5, no. 5 (del 5 al 18 de marzo de 2004).
Panama Canal (Panama)
Panama Canal Watershed (Panama)

43628926
00240269