Discursos y proyectos para afrontar las inundaciones en la Provincia de Buenos Aires, 1890-1910

En este trabajo nos ocuparemos de los debates, entre los ingenieros hidráulicos y entre los políticos, que dieron lugar a diferentes proyectos de solución entre 1890 y 1910, cuando se fueron consolidando las agencias estatales que tendrían intervención en el problema de las inundaciones. Nuestro objetivo es estudiar los recorridos intelectuales y burocráticos que permitieron delinear los proyectos de solución a los problemas hídricos, las investigaciones llevadas a cabo para su concreción y la relación entre la toma de decisiones y los cambios en la política y la economía bonaerense. De esta manera, realizaremos una descripción de las agencias estatales encargadas de la gestión de los recursos hídricos en la provincia de Buenos Aires y esbozaremos una caracterización de los funcionarios actuantes y su relación con el nivel político de la burocracia provincial

Discursos y proyectos para afrontar las inundaciones en la Provincia de Buenos Aires, 1890-1910

En este trabajo nos ocuparemos de los debates, entre los ingenieros hidráulicos y entre los políticos, que dieron lugar a diferentes proyectos de solución entre 1890 y 1910, cuando se fueron consolidando las agencias estatales que tendrían intervención en el problema de las inundaciones. Nuestro objetivo es estudiar los recorridos intelectuales y burocráticos que permitieron delinear los proyectos de solución a los problemas hídricos, las investigaciones llevadas a cabo para su concreción y la relación entre la toma de decisiones y los cambios en la política y la economía bonaerense. De esta manera, realizaremos una descripción de las agencias estatales encargadas de la gestión de los recursos hídricos en la provincia de Buenos Aires y esbozaremos una caracterización de los funcionarios actuantes y su relación con el nivel político de la burocracia provincial

Discursos y proyectos para afrontar las inundaciones en la Provincia de Buenos Aires, 1890-1910

En este trabajo nos ocuparemos de los debates, entre los ingenieros hidráulicos y entre los políticos, que dieron lugar a diferentes proyectos de solución entre 1890 y 1910, cuando se fueron consolidando las agencias estatales que tendrían intervención en el problema de las inundaciones. Nuestro objetivo es estudiar los recorridos intelectuales y burocráticos que permitieron delinear los proyectos de solución a los problemas hídricos, las investigaciones llevadas a cabo para su concreción y la relación entre la toma de decisiones y los cambios en la política y la economía bonaerense. De esta manera, realizaremos una descripción de las agencias estatales encargadas de la gestión de los recursos hídricos en la provincia de Buenos Aires y esbozaremos una caracterización de los funcionarios actuantes y su relación con el nivel político de la burocracia provincial

Report on water resources study of Brandywine Creek basin in Pennsylvania.

Supplement (11 l. illus.), issued in 1959 (Harrisburg, Pa., Bourquard, Geil and Associates, Consulting Hydraulic Engineers)

Laboratory measurement of hydraulic conductivity functions of two unsaturated sandy soils during drying and wetting processes

The importance of applying unsaturated soil mechanics to geotechnical engineering design has been well understood. However, the consumption of time and the necessity for a specific laboratory testing apparatus when measuring unsaturated soil properties have limited the application of unsaturated soil mechanics theories in practice. Although methods for predicting unsaturated soil properties have been developed, the verification of these methods for a wide range of soil types is required in order to increase the confidence of practicing engineers in using these methods. In this study, a new permeameter was developed to measure the hydraulic conductivity of unsaturated soils using the steady-state method and directly measured suction (negative pore-water pressure) values. The apparatus is instrumented with two tensiometers for the direct measurement of suction during the tests. The apparatus can be used to obtain the hydraulic conductivity function of sandy soil over a low suction range (0-10 kPa). Firstly, the repeatability of the unsaturated hydraulic conductivity measurement, using the new permeameter, was verified by conducting tests on two identical sandy soil specimens and obtaining similar results. The hydraulic conductivity functions of the two sandy soils were then measured during the drying and wetting processes of the soils. A significant hysteresis was observed when the hydraulic conductivity was plotted against the suction. However, the hysteresis effects were not apparent when the conductivity was plotted against the volumetric water content. Furthermore, the measured unsaturated hydraulic conductivity functions were compared with predictions using three different predictive methods that are widely incorporated into numerical software. The results suggest that these predictive methods are capable of capturing the measured behavior with reasonable agreement.

Influence of Spatial Variation of Hydraulic Conductivity of Municipal Solid Waste on Performance of Bioreactor Landfill

The current study analyzes the leachate distribution in the Orchard Hills Landfill, Davis Junction, Illinois, using a two-phase flow model to assess the influence of variability in hydraulic conductivity on the effectiveness of the existing leachate recirculation system and its operations through reliability analysis. Numerical modeling, using finite-difference code, is performed with due consideration to the spatial variation of hydraulic conductivity of the municipal solid waste (MSW). The inhomogeneous and anisotropic waste condition is assumed because it is a more realistic representation of the MSW. For the reliability analysis, the landfill is divided into 10 MSW layers with different mean values of vertical and horizontal hydraulic conductivities (decreasing from top to bottom), and the parametric study is performed by taking the coefficients of variation (COVs) as 50, 100, 150, and 200%. Monte Carlo simulations are performed to obtain statistical information (mean and COV) of output parameters of the (1) wetted area of the MSW, (2) maximum induced pore pressure, and (3) leachate outflow. The results of the reliability analysis are used to determine the influence of hydraulic conductivity on the effectiveness of the leachate recirculation and are discussed in the light of a deterministic approach. The study is useful in understanding the efficiency of the leachate recirculation system. (C) 2013 American Society of Civil Engineers.

Transport of Hydraulic Fracturing Water and Wastes in the Susquehanna River Basin, Pennsylvania

The development of the Marcellus Shale gas play in Pennsylvania and the northeastern United States has resulted in significant amounts of water and wastes transported by truck over roadways. This study used geographic information systems (GIS) to quantify truck travel distances via both the preferred routes (minimum distance while also favoring higher-order roads) as well as, where available, the likely actual distances for freshwater and waste transport between pertinent locations (e. g., gas wells, treatment facilities, freshwater sources). Results show that truck travel distances in the Susquehanna River Basin are greater than those used in prior life-cycle assessments of tight shale gas. When compared to likely actual transport distances, if policies were instituted to constrain truck travel to the closest destination and higher-order roads, transport mileage reductions of 40-80% could be realized. Using reasonable assumptions of current practices, greenhouse gas (GHG) emissions associated with water and waste hauling were calculated to be 70-157 MT CO2 eq per gas well. Furthermore, empty so-called backhaul trips, such as to freshwater withdrawal sites or returning from deep well injection sites, were found to increase emissions by an additional 30%, underscoring the importance of including return trips in the analysis. The results should inform future life-cycle assessments of tight shale gases in managed watersheds and help local and regional governments plan for impacts of transportation on local infrastructure. (C) 2013 American Society of Civil Engineers.

Comparison of numerical and physical hydraulic models, Masonboro Inlet, North Carolina : Appendix 2, numerical simulation of hydrodynamics (WRE) /

"June 1977."