For many surface waters, phosphorus (P) leaching is a serious problem that should be minimized to prevent eutrophication. In Sweden there is a demand for physical and technical development of high-performance P removal techniques to reduce phosphorus leaching from on-site wastewater treatment systems to the Baltic Sea. However, although these systems are designed to reduce eutrophication there are also other environmental impacts to be considered when implementing them in on-site systems; energy use and global warming potential are two examples. This study has investigated several bed filter materials (reactive media and natural soils) for their total environmental impact (in commercial applications) as well as for the predominating chemical phosphorus removal mechanisms. The use of life cycle assessment revealed that several reactive bed filters are relatively energy-consuming due to the material manufacturing process. Characterization of phosphorus compounds in used reactive media provided evidence for calcium phosphate precipitation as the predominating P removal mechanism in alkaline filter materials. However, in soil treatment systems with noncalcareous soils, batch experiments and extractions suggested that aluminium compounds were important for P removal. According to mass balance calculations that compared accumulated P with the estimated P load in a soil treatment system, the long term P removal capacity was very low; only 6.4 % of the applied phosphorus had been removed during 16 years of operation. / <p>QC 20110413</p>

Urban waste water collecting systems are designed to convey domestic, industrial and storm water. When sizing sewer network, heavy rainfall must be considered to provide the needed hydraulic capacity for collection. Maintenance is also required in order to avoid anomalies such as inflow, infiltration and unusual polluted discharges from Combined Sewer Overflows (CSOs). Inflow and infiltration decrease the treatment yield at the Waste water Treatment Plant (WWTP) and participate in hydraulic overloads and overflows. CSOs have a direct impact on the pollution of water bodies and must be strictly sized and monitored. Detecting sizing and maintenance anomalies is crucial to ensure public health and a good status of our natural environment. Today, numerical hydraulic models support consulting engineers in assessing overflows then in choosing the best technical and cost-effective scenario. The objectives of this paper are to review the dysfunctions of collecting system and to understand how a numerical hydraulic model is constructed, calibrated and then used to establish a Corrective Action Plan (CAP). My master thesis is based on a working project achieved at SAFEGE (Group SUEZ Environnement) in the Urban Hydraulics Department in Lyon (Rhône-Alpes, France) between September 2013 and February 2014. The paper will present some outcomes obtained from an Urban Hydraulic Project at Chazelles-sur-Lyon (Rhône-Alpes, France) in the South West of Lyon. Mike Urban is the software - developed by the company DHI Water- used for the numerical hydraulic modeling.

This study assesses the phenomenon of additional water intruding into sewage sys-tems in different areas of Sweden. Additional water means in this case the non-foul water that can originate from storm water runoff, which is either supposed to be con-veyed into the pipe system or intrudes it by wrongly connected drains. It can also re-sult from in-seepage of groundwater due to imperfections of the pipe system itself. It is intended to analyze how different features of the areas have an impact on the extent of this phenomenon. Further, an estimation of the conditions in future scenarios will be obtained. This includes an indication about the potential risk of a sewage system overflow, the expected volume of inflow at treatment plants and thus about the sys-tem´s suitability for the future. Numerical, hydrological compartment models for 19 cities in Sweden were set-up. The used parameters were obtained from previous studies by the Swedish Environ-mental Protection Agency. In these models present and future climate data were ap-plied. For future scenarios three different climate change projections were used which contain bias corrected climate data timeseries for each study area. The climate change scenarios were supposed to represent an "optimistic", "average" and "pessimistic" outlook. By assessing the outputs of the climate models, it was concluded that signifi-cant differences can occur, depending on exact geographical location and chosen cli-mate models. A sensitivity analysis was conducted of how geology, climate and status of the pipe system have an impact on the extent of additional water flows. It revealed that the status of the sewage system has by far the biggest impact. Finally a discharge analysis showed a potential outlook of future development of additional water flows for the chosen study sites, yielding highest increase for the sewage systems of Kiruna, Karlskoga and Sundsvall.

Accelerated soil erosion is one of the major threats to agricultural production in Ethiopia and the Harerge region is not exceptional. It is estimated that about 1.5 billion tones of soil is being eroded every year in Ethiopia. In the extreme cases, especially for the highlands, the rate of soil loss is estimated to reach up to 300 t ha-1yr-1 with an average of about 70 t ha -1yr-1 which is beyond any tolerable level. The government have made different attempts to avert the situation since 1975 through initiation of a massive program of soil conservation and rehabilitation of severely degraded lands. Despite considerable efforts, the achievements were far bellow expectations. This study was aimed at assessing the effect of some soil properties, rainfall intensity and slope gradients on surface sealing, soil erodibility, runoff and soil loss from selected sites in the Harerge region, eastern Ethiopia, using simulated rainfall. Soil loss was also estimated for the sites using Soil Loss Estimation Model for Southern Africa (SLEMSA) and the Universal soil Loss Equation (USLE). Moreover, the effectiveness of various rates and patterns of wheat residue mulching in controlling soil loss was also evaluated for one of the study sites, (i.e. Regosol of Alemaya University), under both rainfall simulation and field natural rainfall conditions. For most of the erosion parameters, the interaction among soil texture, slope gradient and rainfall intensity was significant. In general however, high rainfall intensity induced high runoff, sediment yield and splash. The effect of slope gradients on most of the erosion parameters was not significant as the slope length was too small to bring about a concentrated flow. The effect of soils dominated by any one of the three soil separates on the erosion parameters was largely dependent on rainfall intensity and slope gradient. The soils form the 15 different sites in Harerge showed different degrees of vulnerability to surface sealing, runoff and sediment yield. These differences were associated with various soil properties. Correlation of soil properties to the erosion parameters revealed that aggregate stability was the main factor that determined the susceptibility of soils to sealing, runoff and soil loss. This was in turn affected by organic carbon content, percent clay and exchangeable sodium percentage (ESP). Soils with relatively high ESP such as those at Babile (13.85) and Gelemso (7.18) were among the lowest in their aggregate stability (percent water stable aggregates of 0.25 –2.0mm diameter); and have highest runoff and sediment yield as compared to other soils in the study. Similarly, most of those soils with relatively low ESP, high organic carbon content (OC%) and high water stable aggregates such as Hamaressa, AU (Alemaya University) vertisol and AU regosol were among the least susceptible to sealing and interrill erosion. Nevertheless, some exceptions include soils like those of Hirna where high runoff was recorded whilst having relatively high OC%, low ESP and high water stable aggregates. Both the SLEMSA and USLE models were able to identify the erosion hazards for the study sites. Despite the differences in the procedures of the two models, significant correlation (r = 0.87) was observed between the values estimated by the two methods. Both models estimated higher soil loss for Gelemso, Babile, Karamara and Hamaressa. Soil loss was lower for Diredawa, AU-vertisol and AU-Alluvial all of which occur on a relatively low slope gradients. The high soil loss for Babile and Gelemso conforms with the relative soil erodibility values obtained under rainfall simulation suggesting that soil erodibility, among others, is the main factor contributing to high soil loss for these soils. The difference in the estimated soil losses for the different sites was a function of the interaction of the various factors involved. Though the laboratory soil erodibility values were low to medium for Hamaressa and Karamara, the estimated soil loss was higher owing to the field topographic situations such as high slope gradient. SLEMSA and USLE showed different degrees of sensitivities to their input variables for the conditions of the study sites. SLEMSA was highly sensitive to changes in rainfall kinetic energy (E) and soil erodibility (F) and less sensitive to the cover and slope length factors. The sensitivity of SLEMSA to changes in the cover factor was higher for areas having initially smaller percentage rainfall interception values. On the other hand, USLE was highly sensitive to slope gradient and less so to slope length as compared to the other input factors. The study on the various rates and application patterns of wheat residue on runoff and soil loss both in the laboratory rainfall simulation and under field natural rainfall conditions revealed that surface application of crop residue is more effective in reducing soil loss and runoff than incorporating the same amount of the residue into the soil. Likewise, for a particular residue application method, runoff and soil loss decreased with increasing application rate of the mulch. However, the difference was not significant between 4 Mg ha-1 and 8 Mg ha-1 wheat straw rates suggesting that the former can effectively control soil loss and can be used in areas where there is limitation of crop residues provided that other conditions are similar to that of the study site (AU Regosols). The effectiveness of lower rates of straw (i.e. less than 4 Mg ha-1 ) should also be studied. It should however be noted that the effectiveness of mulching in controlling soils loss and runoff could be different under various slope gradients, rainfall characteristics and cover types that were not covered in this study. Integrated soil and water conservation research is required to develop a comprehensive database for modelling various soil erosion parameters. Further research is therefore required on the effect of soil properties (with special emphasis to aggregate stability, clay mineralogy, exchangeable cations, soil texture and organic matter), types and rates of crop residues, cropping and tillage systems, mechanical and biological soil conservation measures on soil erosion and its conservation for a better estimation of the actual soil loss in the study sites. Copyright 2004, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. Please cite as follows: Bobe, BW 2004, Evaluation of soil erosion in the Harerge region of Ethiopia using soil loss models, rainfall simulation and field trials, PhD thesis, University of Pretoria, Pretoria, viewed yymmdd < http://upetd.up.ac.za/thesis/available/etd-08022004-141533 / > / Thesis (PhD (Soil Science))--University of Pretoria, 2004. / Plant Production and Soil Science / unrestricted

En este artículo, se realizó un análisis de infiltración de agua en la presa de tierra Coltani ubicada en el departamento de Tacna, Perú. Primero, se realizó un análisis de infiltración mediante el programa Slide el cual permite evaluar flujos de agua por medio de la hipótesis flujo permanente, de manera bidimensional y con un suelo isotrópico. Luego, se estudió la infiltración del agua subterránea de la presa Coltani tanto en su condición inicial como en su condición con muro pantalla. En esta última, se consideró como referencia el caudal de infiltración máximo permisible para proponer las alternativas en relación a su ubicación. Se consideró un diámetro de 1.5 metros y una profundidad de 30 metros con posibles ubicaciones al inicio, centro y final de la presa. Finalmente, se obtuvieron diversos resultados de caudales de salida en el primer estrato del suelo demostrando el impacto generado por las diversas ubicaciones de los pilotes secantes como muro impermeable. Se obtuvo como principal resultado, la ubicación ideal de los pilotes secantes al final de la presa Coltani con un valor de infiltración del agua subterránea de 0.00276 m3/s en el estrato inicial, verificándose en relación al caudal de infiltración máximo permisible (Qfmp). / In this article, a water seepage analysis was performed in the Coltani earth dam located in the department of Tacna, Peru. First, a seepage analysis was carried out using the Slide program, which allows to evaluate water flows through the permanent flow hypothesis, in a two-dimensional way and with an isotropic soil. Subsequently, the seepage of the underground water from the Coltani dam was studied, both in its initial condition and in its condition as a barrier wall. The maximum allowable seepage flow was considered as a reference to propose the alternatives in relation to its location. A diameter of 1.5 meters and a depth of 30 meters were considered with possible locations at the beginning, center and end of the dam. Finally, various outflow results were obtained in the first soil stratum, demonstrating the impact generated by the various locations of the secant piles as an impermeable wall. The main result was the ideal location of the secant piles at the end of the Coltani dam with a groundwater seepage value of 0.00276 m3/s in the initial stratum, verified in relation to the maximum allowable seepage flow (Qfmp). / Trabajo de investigación

Using action orientation after failure as a measure of individual differences in emotion regulation abilities (ERA), this thesis’ studies investigated the impact of ERA on cognition, behavior, and own versus imposed goals differentiation. The first study used cortisol as a physiological stress marker to replicate the link between ERA and the ability to make intuitive judgments under stress. High ERA were associated with increased performance in an intuition task under stress. In contrast, when feeling no stress, low ERA were associated with increased performance in an intuition task. The second study showed that ERA can compensate for depression-associated biased processing of negative stimuli. This effect was present even at mild to moderate depression levels. Replicating earlier findings, the third study showed that ERA are associated with an increased ability to distinguish self-chosen from imposed goals. Most importantly, the study identified activation in the right medial prefrontal cortex as a neural correlate of identifying self-chosen goals, and activation in the anterior cingulate cortex, as a correlate of falsely identifying imposed goals as self-chosen ones. Altogether, these studies show the necessity to consider individual differences in ERA in stress, clinical, and motivational research. The findings are discussed with respect to three theories that relate to motivation and personality from behavioral and neurobiological perspectives, namely, Personality Systems Interaction Theory, Predictive and Reactive Control Systems Theory, and Self-Determination Theory.

Administrative building with changing rooms and washrooms facilities for associated industrial production in the faktory building. Use rainwater for flushing. Solution separated sewers. Rainwater brought into the retention tank where it is collected for flushing, excess rain water seeps through theblocks generated drainage system in the basement. Investigation using water-efficient fixtures and equipment. Designed saving shower heads, batteries, toilet tanks and efficient operation of the urinals.

The master‘s thesis deals with the detection of rainwater infiltration in soils using the method of electrical impedance spectrometry. Its aim is to assess the suitability of this method and equipment for measuring the role of water infiltration in soils.

京都大学 / 0048 / 新制・課程博士 / 博士(工学) / 甲第21094号 / 工博第4458号 / 新制||工||1693(附属図書館) / 京都大学大学院工学研究科都市環境工学専攻 / (主査)教授 米田 稔, 教授 高岡 昌輝, 准教授 福谷 哲 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DFAM

Aluminium matrix composites are among the most promising candidate materials for light weight and high strength applications such as transportation and armour. In a previous study 6061 aluminum matrix composites reinforced with plain weave carbon fiber preform (AS4 Hexcel) were successfully fabricated by squeeze casting using the laminate fabrication technique. This research aims at optimizing the fabrication process in order to achieve improved strength and mechanical properties. It focuses on the liquid infiltration squeeze casting method. Good mechanical bonding between fiber and aluminium is achieved thanks to improved infiltration and impregnation of the fabric by liquid aluminium. Oxidation products at fiber/aluminium interface and porosity are reduced. As a result, composites are produced with overall improved mechanical properties. The flexural strength is increased by up to 19.9% and 15.4% compared to the laminate approach and the reference 6061 aluminium alloy squeeze cast under identical conditions, respectively. Similarly, overall hardness is improved. However, the impact strength is reduced by 7.76% and 25.78% when compared to casts fabricated by the laminate method and the reference aluminium alloy, respectively. The thesis constitutes a good basis for further research on fiber and particle reinforced aluminium matrix composites with the goal of further improving fracture toughness, particularly for gradient materials used in armour applications.