Water balance modelling in a tropical watershed under deciduous forest (Mule Hole, India): Regolith matric storage buffers the groundwater recharge process

Accurate estimations of water balance are needed in semi-arid and sub-humid tropical regions, where water resources are scarce compared to water demand. Evapotranspiration plays a major role in this context, and the difficulty to quantify it precisely leads to major uncertainties in the groundwater recharge assessment, especially in forested catchments. In this paper, we propose to assess the importance of deep unsaturated regolith and water uptake by deep tree roots on the groundwater recharge process by using a lumped conceptual model (COMFORT). The model is calibrated using a 5 year hydrological monitoring of an experimental watershed under dry deciduous forest in South India (Mule Hole watershed). The model was able to simulate the stream discharge as well as the contrasted behaviour of groundwater table along the hillslope. Water balance simulated for a 32 year climatic time series displayed a large year-to-year variability, with alternance of dry and wet phases with a time period of approximately 14 years. On an average, input by the rainfall was 1090 mm year(-1) and the evapotranspiration was about 900 mm year(-1) out of which 100 mm year(-1) was uptake from the deep saprolite horizons. The stream flow was 100 mm year(-1) while the groundwater underflow was 80 mm year(-1). The simulation results suggest that (i) deciduous trees can uptake a significant amount of water from the deep regolith, (ii) this uptake, combined with the spatial variability of regolith depth, can account for the variable lag time between drainage events and groundwater rise observed for the different piezometers and (iii) water table response to recharge is buffered due to the long vertical travel time through the deep vadose zone, which constitutes a major water reservoir. This study stresses the importance of long term observations for the understanding of hydrological processes in tropical forested ecosystems. (C) 2009 Elsevier B.V. All rights reserved.

Comparison of electrical resistivity by geophysical method and neutron probe logging for soil moisture monitoring in a forested watershed

Geophysical methods are becoming more popular nowadays in the field of hydrology due to their time and space efficiency. So an attempt has been made here to relate electrical resistivity with soil moisture content in the field. The experiments were carried out in an experimental watershed `Mulehole' in southern India, which is a forested watershed with approximately 80% red soil. Five auger holes were drilled to perform the soil moisture and electrical resistivity measurements in a toposequence having red and black soils, with sandy weathered soil at the bottom. Soil moisture was measured using neutron probe and electrical resistivity was measured using electrical logging tool. The results indicate that electrical resistivity measurements can be used to measure soil moisture content for red soils only.

Lois sur la compétence des fonctionnaires publics de toutes les hiérarchies ... par M. Dupin,...

[Loi. 1825]

« Recherche de la noblesse de la Généralité de Rouen, faicte depuis l'an 1666 jusques en l'an 1672, par messire Jacques Barin, marquis de La Gallissonnière ».

Contient : Registre des personnes nobles dressé, en 1463, par Raymond Monfaut ; État des anoblis de 1470 ; Recherche de la noblesse, dans la Généralité de Caen, par Jean-Jacques de Mesmes, seigneur de Roissy, Michel de Repichon et Jacques de Croismare (1598-1599) ; « Estat de la recherche de la noblesse de la Généralité d'Alençon » (1666) ; « Noms des personnes déclarées nobles par arrest de la Cour des aydes de Normandie,... par ordre alphabétique » ; Recherche de la noblesse dans la Généralité de Caen, par Chamillart (1666) ; « Recherche des nobles de l'élection de Lisieux, faite par MM. Nicolas Le Valois, François Le Roy, et Jean Hediart » (1540)

El nou llenguatge: art i poesia

Materials didàctics del grup d'investigació Observatori sobre la Didàctica de les Arts (ODAS)

Age determination and sea surface temperature reconstruction for the Southern Ocean

The isotopic and micropaleontological deglacial records of three deep-sea cores from 44°S to 55°S have been dated by accelerator mass spectrometry. The available records did not allow accurate dating of the initiation of the deglaciation. By 13,000 years B.P., sea surface temperatures reached values similar to the present values. A cool oscillation abruptly interrupted this warm phase between 12,000 and 11,000 years B.P. Initiation of this cooling therefore preceded the northern hemisphere Younger Dryas by approximately 1000 years. Complete warming was reached by 10,000 years B.P., more or less synchronous with the northeast Atlantic Ocean.

O ENSINO DA FILOSOFIA NAS DIRETRIZES DE JEAN MAUGÜÉ E NO HISTORICISMO DO PENSAMENTO DE JOÃO DA CRUZ COSTA: PIONEIRISMO NA UNIVERDSIDADE DE SÃO PAULO

O presente estudo foi desenvolvido com o objetivo de refletir a relevância do Ensino de Filosofia no contexto histórico brasileiro em consonância conjectural paulistana. Apontamos através do Decreto nro. 6.283 de 25 de janeiro de 1934, o qual instituiu-se sendo a primeira Universidade brasileira (Universidade de São Paulo) nas palavras de Vita “iniciativa pioneira no Brasil” (1969, p.16). Inspirada no modelo universitário tradicional da cultura filosófica francesa, a Faculdade de Filosofia, Ciências e Letras adotou desde os seus contíguos metodológicos aos procedimentos intelectivos, favorecendo o desenvolvimento da interdisciplinaridade da formação cultural. Uma confluência marcada por intensos envolvimentos ideológicos estruturados do progresso moderno, infundindo competências científicas na faculdade profissional incorporada à universidade, bem como formar professores para o ensino secundário (SCHWARTZMAN, 2006, p.163). Sendo assim, a Faculdade de Filosofia seria o núcleo propulsor. Porém, o modelo centralizador de pensar o Ensino da Filosofia, a atribui uma superioridade técnica intelectual e saber acumulado, pouco distingue da competência escolar conquistada em outros países, pelo potencial formativo dos professores filósofos Jean Maugüé (1955,1982) e João da Cruz Costa (1945, 1960, 1961,1967). Mauguë aponta-nos quão a formação em Filosofia está diretamente atribuída ao docente e ao aluno, que a ela se dedica. Pela obra Ensino de Filosofia e Diretrizes, ele apresenta-nos também a concepção de docência: o docente-intelectual, comprometido com a (re) construção dos significados epistemológicos, legitimados por uma prática pedagógica entre o já conhecido e ao conhecer, ou seja, entre o ensinado e ao ensinar. Nesse sentido, é notável que os argumentos do docente e do filósofo se imbricam, ao ponto de serem confundidos e potencializados durante a formação. Assim, Cruz Costa, também trabalha, quando assume a cátedra, porém ressalta que o processo formativo adquire sentido pela História das Ideias como construção do pensamento filosófico e, portanto, o ensino se faz quando se toma consciência da concentricidade histórica, ideias que lhe concede significado conjugado às técnicas de erudição, o que fez advertir aos seus alunos para as vicissitudes pelas quais passaram em nossa terra, as correntes filosóficas estrangeiras, e, sobretudo, para a curiosa significação que elas têm apresentado no envolver de nossa história (VITA, 1950, p.22). O conhecimento histórico é o caminho norteador a ser percorrido, necessário ao devir humano, isto é, a conciliação entre o conhecimento teórico e as condições históricas.

Letters from Daniel Bates to William Jenks, May 1795-September 1798

Daniel Bates wrote these five letters to his friend and classmate, William Jenks, between May 1795 and September 1798. In a letter written May 12, 1795, Bates informs Jenks, who was then employed as an usher at Mr. Webb's school, of his studies of Euclid, the meeting of several undergraduate societies, and various sightings of birds, gardens and trees. In a letter written in November 1795 from Princeton, where he was apparently on vacation with the family of classmate Leonard Jarvis, he describes playing the game "break the Pope's neck" and tells Jenks what he was reading (Nicholson, Paley?, and Thompson) and what his friend's father was reading (Mirabeau and Neckar).

Atlantic 231Pa/230Th and biogenic opal compilation of the Holocene and the LGM

The strength and geometry of the Atlantic meridional overturning circulation is tightly coupled to climate on glacial-interglacial and millennial timescales, but has proved difficult to reconstruct, particularly for the Last Glacial Maximum. Today, the return flow from the northern North Atlantic to lower latitudes associated with the Atlantic meridional overturning circulation reaches down to approximately 4,000 m. In contrast, during the Last Glacial Maximum this return flow is thought to have occurred primarily at shallower depths. Measurements of sedimentary 231Pa/230Th have been used to reconstruct the strength of circulation in the North Atlantic Ocean, but the effects of biogenic silica on 231Pa/230Th-based estimates remain controversial. Here we use measurements of 231Pa/230Th ratios and biogenic silica in Holocene-aged Atlantic sediments and simulations with a two-dimensional scavenging model to demonstrate that the geometry and strength of the Atlantic meridional overturning circulation are the primary controls of 231Pa/230Th ratios in modern Atlantic sediments. For the glacial maximum, a simulation of Atlantic overturning with a shallow, but vigorous circulation and bulk water transport at around 2,000 m depth best matched observed glacial Atlantic 231Pa/230Th values. We estimate that the transport of intermediate water during the Last Glacial Maximum was at least as strong as deep water transport today.

Oeuvres de feu /

Mode of access: Internet.

Recueil de cartes géographiques, plans, vues et médailles de l'ancienne Gréce, relatifs au voyage du jeune Anacharsis; précédé d'une analy se critique des cartes

MTSD 0423-8.