"In Situ Ground Water Remediation Using the Trench and Gate System" by Marc W. Bowles, L.R. Bently, B. Hoyne and D.A. Thomas.     

Ken Hugo 《Ground water》2000,38(6):805-805

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The Alpine nappe stack in western Austria: a crustal-scale cross section     

Hannah Pomella  Hugo Ortner  Michael Zerlauth  Bernhard Fügenschuh 《International Journal of Earth Sciences》2015,104(3):733-745

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Large block slide at San Juan Grijalva, Northwest Chiapas, Mexico     

V��ctor Manuel Hern��ndez-Madrigal  Juan Carlos Mora-Chaparro  V��ctor Hugo Gardu?o-Monroy 《Landslides》2011,8(1):109-115

On November 4, 2007, a large block slide occurred on the south face of the Cerro La Pera at San Juan Grijalva (SJG), northwest Chiapas, Mexico. The SJG landslide has an area of 1.11 km² and a volume of 50 Mm³, making it one of the largest landslide of its type in the twentieth century. The landslide created a dam over 80 m high and 1,170 m wide across the Grijalva River, backing up the water and forming a 49 km² lake. Landslide-generated tsunamis up to 15 m high destroyed the village of SJG, and the newly formed lake flooded 21 villages located upstream. The landslide killed 16 people and caused around 3,600 to be evacuated with incalculable economic losses. It was perhaps the most catastrophic landslide in the history of Mexico. The probable trigger of the landslide was cumulative precipitation of about 67% of the average annual rainfall over the preceding 30 days. The associated potentially causative factors include a M4.5 earthquake that occurred 5 days before the landslide and a water-level drawdown at the Grijalva River generated by the release of water from the Pe?itas dam located 14 km downstream.  相似文献   

Effect of implementing ecosystem functional type data in a mesoscale climate model     

Seung-Jae LEE  E. Hugo BERBERY  Domingo ALCARAZ-SEGURA 《大气科学进展》2013,30(5):1373-1386

In this paper, we introduce a new concept of land-surface state representation for southern South America, which is based on "functional" attributes of vegetation, and implement a new land-cover (Ecosystem Functional Type, hereafter EFT) dataset in the Weather and Research Forecasting (WRF) model. We found that the EFT data enabled us to deal with functional attributes of vegetation and time-variant features more easily than the default land-cover data in the WRF. In order to explore the usefulness of the EFT data in simulations of surface and atmospheric variables, numerical simulations of the WRF model, using both the US Geological Survey (USGS) and the EFT data, were conducted over the La Plata Basin in South America for the austral spring of 1998 and compared with observations. Results showed that the model simulations were sensitive to the lower boundary conditions and that the use of the EFT data improved the climate simulation of 2-m temperature and precipitation, implying the need for this type of information to be included in numerical climate models.  相似文献   

Studies in the application of recurrence relations to special perturbation methods     

Hugo E. Schwarz  Ian W. Walker 《Celestial Mechanics and Dynamical Astronomy》1982,27(2):191-202

The numerical integration of the differential equations describing dynamical systems has been shown in previous papers of this series to be most effectively accomplished by an explicit Taylor series method.In this paper we show that one explicit Taylor series method, developed earlier in this series and which appears to possess a high degree of versatility, yields considerable gains in efficiency over classical single-step and multi-step methods. (In this context efficiency is a measure of the time taken to carry out a calculation of a specific accuracy).For a given accuracy criterion governing the local truncation error (LTE) it is found that the Taylor series method is generallytwice as fast as the classical multi-step method and up totwenty times faster than the classical single-step method.  相似文献   

Optimizing urban stormwater control strategies and assessing aquifer recharge through drywells in an urban watershed     

Boroomandnia  Arezoo  Bozorg-Haddad  Omid  Bahrami  Mahdi  Goharian  Erfan  Singh  Vijay P.  Lo&#;iciga  Hugo A. 《Hydrogeology Journal》2021,29(4):1379-1398

Hydrogeology Journal - A coupled simulation-optimization model (SOM) is developed in this work that links the US Environmental Protection Agency’s Storm Water Management Model (SWMM) with a...  相似文献   

Analysis of water control in an underground mine under strong karst media influence (Vazante mine,Brazil)     

Hugo Ninanya  Nilson Guiguer  Eurípedes A. VargasJr  Gustavo Nascimento  Edmar Araujo  Caroline L. Cazarin 《Hydrogeology Journal》2018,26(7):2257-2282

This work presents analysis of groundwater flow conditions and groundwater control measures for Vazante underground mine located in the state of Minas Gerais, Brazil. According to field observations, groundwater flow processes in this mine are highly influenced by the presence of karst features located in the near-surface terrain next to Santa Catarina River. The karstic features, such as caves, sinkholes, dolines and conduits, have direct contact with the aquifer and tend to increase water flow into the mine. These effects are more acute in areas under the influence of groundwater-level drawdown by pumping. Numerical analyses of this condition were carried out using the computer program FEFLOW. This program represents karstic features as one-dimensional discrete flow conduits inside a three-dimensional finite element structure representing the geologic medium following a combined discrete-continuum approach for representing the karst system. These features create preferential flow paths between the river and mine; their incorporation into the model is able to more realistically represent the hydrogeological environment of the mine surroundings. In order to mitigate the water-inflow problems, impermeabilization of the river through construction of a reinforced concrete channel was incorporated in the developed hydrogeological model. Different scenarios for channelization lengths for the most critical zones along the river were studied. Obtained results were able to compare effectiveness of different river channelization scenarios. It was also possible to determine whether the use of these impermeabilization measures would be able to reduce, in large part, the elevated costs of pumping inside the mine.  相似文献   

Consistent joint elastic‐electrical differential effective‐medium modelling of compacting reservoir sandstones     

Erling Hugo Jensen  Leiv‐J. Gelius  Tor Arne Johansen  Zhong Wang 《Geophysical Prospecting》2013,61(4):788-802

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A first classification scheme of flow-bed interaction for clay-laden density currents and soft substrates     

Iris Thérèse Elise Verhagen  Jaco Hugo Baas  Ricardo Silva Jacinto  William Dale McCaffrey  Alan Geoffrey Davies 《Ocean Dynamics》2013,63(4):385-397

Many aquatic environments exhibit soft, muddy substrates, but this important property has largely been ignored in process-based models of Earth-surface flow. Novel laboratory experiments were carried out to shed light on the feedback processes that occur when particulate density currents (turbidity currents) move over a soft mud substrate. These experiments revealed multiple types of flow-bed interaction and large variations in bed deformation and bed erosion, which are interpreted to be related to the interplay between the shear forces of the current and the stabilising forces in the bed. Changes in this force balance were simulated by varying the clay concentrations in the flow and in the bed. Five different interaction types are described, and dimensional and non-dimensional phase diagrams for flow-bed interaction are presented.  相似文献   

Soil charcoal stability over the Holocene—Response to comments by Mikael Ohlson     

Guillaume de Lafontaine  Hugo Asselin 《Quaternary Research》2012,78(1):155-156

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