Дисертації з теми "Areal infiltration"
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Clarke, Travis Jonathan. "Neuroimmune-Mediated Alcohol Effects on Ventral Tegmental Area Microglia and Infiltrating Leukocytes." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7566.
Повний текст джерелаBui, Xuan Dung, Thi Hoai Thu Vu, Thi My Linh Nguyen, and Takashi Gomi. "Temporal and spatial infiltration characteristics of soil under acacia and pine plantations in the mountainous area of Van Don, Quang Ninh, Vietnam." Technische Universität Dresden, 2019. https://tud.qucosa.de/id/qucosa%3A70826.
Повний текст джерелаĐể xác định đặc điểm thấm nước của đất dưới rừng trồng Thông và Keo, vòng đôi đo tốc độ thấm đã được sử dụng để đo ở sườn trên, sườn giữa và sườn dưới (5 lần/ ví trí) cho mỗi loại hình rừng từ tháng 6-8/2018. Trong khi, thuốc nhuộm được sử dụng để kiểm tra đặc điểm thấm nước của đất theo không gian trên 3 ô (ô không có cây, ô trồng Keo và ô trồng Thông). Các yếu tố ảnh hưởng đến đặc điểm thấm nước cũng được phân tích. Kết quả chính thu được: (1) Tốc độ thấm ở cả hai loại rừng giảm dần theo thời gian và cao nhất ở sườn dưới, nhỏ nhất ở sườn giữa. Cả tốc độ thấm và tổng lượng nước thấm trong một giờ của rừng keo đều cao hơn so với rừng Thông. Tuy nhiên, chỉ có tốc độ thấm ổn định là khác biệt có ý nghĩa thống kê; (2) Diện tích và độ sâu nước thấm xuống đất cao nhất ở ô không có cây, nhỏ hơn ở ô trồng Keo và nhỏ nhất ở ô trồng Thông; (3) Độ che phủ thực vật càng cao thì lượng nước thấm càng lớn.
Stewart, Anne M. "Estimation of urban-enhanced infiltration and groundwater recharge, Sierra Vista subbasin, southeast Arizona USA." Thesis, The University of Arizona, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3618344.
Повний текст джерелаThis dissertation reports on the methods and results of a three-phased investigation to estimate the annual volume of ephemeral-channel-focused groundwater recharge attributable to urbanization (urban-enhanced groundwater recharge) in the Sierra Vista subwatershed of southeastern Arizona, USA. Results were used to assess a prior estimate.
The first research phase focused on establishment of a study area, installation of a distributed network of runoff gages, gaging for stage, and transforming 2008 stage data into time series of volumetric discharge, using the continuous slope-area method. Stage data were collected for water years 2008 - 2011.
The second research phase used 2008 distributed runoff data with NWS DOPPLER RADAR data to optimize a rainfall-runoff computational model, with the aim of identifying optimal site-specific distributed hydraulic conductivity values and model-predicted infiltration.
The third research phase used the period-of-record runoff stage data to identify study-area ephemeral flow characteristics and to estimate channel-bed infiltration of flow events. Design-storm modeling was used to identify study-area predevelopment ephemeral flow characteristics, given the same storm event. The difference between infiltration volumes calculated for the two cases was attributed to urbanization. Estimated evapotranspiration was abstracted and the final result was equated with study-area-scale urban-enhanced groundwater recharge. These results were scaled up to the Sierra Vista subwatershed: the urban-enhanced contribution to groundwater recharge is estimated to range between 3270 and 3635 cubic decameters (between 2650 and 2945 acre-feet) per year for the period of study. Evapotranspirational losses were developed from estimates made elsewhere in the subwatershed. This, and other sources of uncertainty in the estimates, are discussed and quantified if possible.
Twahirwa, Joseph. "Evaluation of infiltration, run-off and sediment mobilisation using rainfall simulations in the Riebeek-Kasteel Area, Western Cape - South Africa." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3938_1298351935.
Повний текст джерелаThe project was conducted on a small-scale catchment at Goedertrou in the Riebeek- Kasteel district. The focus of this study was to address some of the hydrological processes active in the research catchment, namely infiltration, run-off and sediment mobilisation on different soil types. It was done to investigate the origin of Berg River pollutants. To answer the overall question about what influence the natural salt load of the Berg River, a number of subprojects have been identified, one of which is to understand the hydrological processes in the soil mantle and vadose zone. Hence, the study aimed to answer the research questions mentioned and discussed in section 1.3 of Chapter 1. Considering the results, it could be suggested that decayed root systems from the rows of plants, soil cracks, small channels and openings created by small animals, as well as slope orientation and, therefore, soil composition, all played a major role in influencing the ability of the soil to absorb the simulated rainfall. In this study, the factors that influenced run-off are micro topography, soil moisture, root system, animal activities in soil profile, soil crack dimensions and the hydraulic conductivity. The main factors that played a major role to influence sediments mobilisation are strongly believed to be the micro topography within the ring, slope gradient and length, vegetation cover and rainfall-simulation intensity. After using different techniques, the results show that farmers must be aware that with storm rainfall, particles smaller than 65 &mu
m are subject to mobilisation. It is important to let land-users know that they need proper and appropriate methods for land-use.
Karczynski, Adam Michael. "Measuring Hydraulic Conductivity of Variably-Saturated Soils at the Hectometer Scale Using Cosmic-Ray Neutrons." Thesis, The University of Arizona, 2014. http://hdl.handle.net/10150/323446.
Повний текст джерелаTomasini, Montenegro Claudia. "Evaluation of the sustainability of controlling diffuse water pollution in urban areas on a life cycle basis." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/evaluation-of-the-sustainability-of-controlling-diffuse-water-pollution-in-urban-areas-on-a-life-cycle-basis(6d5d86ca-eae0-4b30-bbe1-ddf971780d00).html.
Повний текст джерелаMcMaine, John T. "HYDROLOGIC CHARACTERIZATION OF A RAIN GARDEN MITIGATING STORMWATER RUNOFF FROM A COMMERCIAL AREA." UKnowledge, 2013. http://uknowledge.uky.edu/bae_etds/19.
Повний текст джерелаAljoumani, Basem. "Soil water management: evaluation of infiltration in furrow irrigarion systems, assessing water and salt content spatially and temporally in the Parc Agrari del Baix Llobregat area." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/119730.
Повний текст джерелаGonzalez-Ramirez, Noemi. "Simulating Flood Propagation in Urban Areas using a Two-Dimensional Numerical Model." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_dissertations/648.
Повний текст джерелаSilva, Carmen Sofia Rocha. "Análise da evolução da ocupação e uso do solo no Concelho de Angra do Heroismo. Influência nos movimentos de terreno e de vertente." Master's thesis, ISA, 2010. http://hdl.handle.net/10400.5/3112.
Повний текст джерелаThis master dissertation aims to study mass movements dynamics and its classification, as well as the identification of the factors that control and initiate them. These concepts and knowledge were applied to the district of Angra do Heroísmo in Terceira´s island of the Azores in order to elaborate a map where the areas showing susceptibility to mass movements were identified. This identification and mapping of mass movements is a contribution to the planning and management of the municipality territory, where the natural conditions are favorable to the geomorphic instability. The misadjusted human actions in this vulnerable region can improve the landscape instability. There are several causes for the mass movements starting. Usually, the beginning of a mass movement is attributed to a single factor, as for instance an unusual precipitation, however this does not correspond to the reality, as a complex number of factors are involved. It was given highlight in this study to the human action as a trigger factor, that in a perspective of sustainable management and development, allow to understand how devastation and significant can be his action. In a perspective of identifying the impact of human actions in the mass movements, as well as the characterization of the geomorphic susceptibility of the area in study, the maximum infiltration areas were delimitated. The maximum infiltration areas are one of the most important territory management figures to preserve, and several times have misadjusted human occupation. In order to delimitate these areas, as well as to elaborate the mass movements susceptibility map for the district of Angra do Heroísmo, several physical characteristics of the region were analysed: geology/lithology, volcanic activity and seismicity, geomorphology, soils, etc. The Permeability of the geologic formations and the soils was also evaluated. Intervention actions for the area were recommended to implement in the most instable areas, in order to promote its protection, conservation or recuperation. These measures are considered crucial to maintain the balance of the Landscape, and prevent the occurrence of possible catastrophic events.
Garpefjäll, Matilda, and Josefin Johansson. "Grundvatten som dricksvattenresurs i kustnära kommuner." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230787.
Повний текст джерелаDrinking water is a vital resource that often is taken for granted. This is a problem not least in municipalities along the coast of Sweden. This due to the salty sea water that pushes towards land. It is very popular in today's society to live in coastal areas. There are both many vacation houses but also a lot of permanent livings. It is common these days that people choose to turn their vacation house into permanent living house and that has its effects on the drinking water resource. The houses of coastal areas are getting their drinking water from individual wells instead of the communal water. The main problem for the drinking water in the coastal areas are therefore the quality of the groundwater. There are risk for infiltration of salt water to the ground water. When the salt reaches the ground water, it will end up in the well and reduce the quality. That makes it a huge problem in these areas. Not to mention that the groundwater reservoirs are very limited in these territories, which limits the groundwater as a drinking water resource at the coast. To exemplify the facts, this study will cover the information for three different municipalities along the coast of Sweden. These are Norrtälje, Tyresö and Oskarsham. The drinking water supply in these three municipalities are similar but one thing that is different is the plan for sustainable drinking water supplies. Building and storage of groundwater in these areas is very limited due to the geological formation, which threatens groundwater levels. In order to secure the municipalities groundwater reservoirs, water protection areas can be made. The three municipalities all work for sustainable drinking water supply, but none of them manage to reach the goal “sustainable”. Both Norrtälje and Oskarshamn has water protection areas for its significant water resources. However, Tyresö has no water conservation areas, but they have nature reserves and national parks instead, that also protect the water. A water protection does not solve the problem of an over-exploited groundwater outlet. There are methods required to ensure that the outlets are smaller than the formation of groundwater. Such a method is the calculation of the groundwater balance in the area, which shows when the groundwater formation occurs and when the outlet is the largest during a certain period of time. After that, the outlet can be planned according to the capacity of the water source. Another solution is to contribute to increased groundwater formation through artificial infiltration. This can be done by sprinklers or surface water ponds, where they can supply water to the groundwater, and the outlet can be taken along the new groundwater formation. In addition to these proposals, the current advices and guidelines for individual water supply need to be tightened up and be replaced with laws and regulations. There are many moves that must be taken as soon as possible for the municipalities to achieve the goal "Grundvatten av god kvalitet", which is now unreachable for its time limit by 2020.
Costa, Francisco Canind? Camilo da. "Obten??o de comp?sitos cer?micos baseados em Al2O3/TiC atrav?s dos precursores polim?ricos." Universidade Federal do Rio Grande do Norte, 2011. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15570.
Повний текст джерелаUniversidade Federal do Rio Grande do Norte
The obtaining of ceramic materials from polymeric precursors is subject of numerous studies due to lower energy costs compared to conventional processing. The aim of this study is to investigate and improve the mechanism for obtaining ceramic matrix composite (CMC) based on SiOC/Al2O3/TiC by pyrolysis of polysiloxane in the presence of an active filler and inert filler in the pyrolysis temperature lower than the usually adopted for this technique, with greater strength. It also investigates the influence of pyrolysis temperature, the content of Alas active filler, the presence of infiltrating agents (Al, glass and polymer) after pyrolysis, temperature and infiltration time on some physical and mechanical properties. Alumina is used as inert filler and Al and Ti as active filler in the pyrolysis. Aluminum, glass and polysiloxane are used as agents infiltrating the post-pyrolysis. The results are analyzed with respect to porosity and bulk density by the Archimedes method, the presence of crystalline phases by X-ray diffraction (XRD) and microstructure by scanning electron microscopy (SEM). The ceramic pyrolyzed between 850 ?C 1400 ?C contain porosity 15% to 33%, density 2.34 g/cm3 and flexural strength at 4 points from 30 to 42 MPa. The microstructure features are porous, with an array of Al2O3 reinforced by TiC particles and AlTi3. The infiltration post-pyrolysis reveals decrease in porosity and increase density and strength. The composites have potential applications where thermal stability is the main requirement
A obten??o de materiais cer?micos a partir de precursores polim?ricos ? objeto de in?meros estudos devido ao menor custo energ?tico em rela??o ao processamento convencional. O objetivo deste trabalho foi investigar e aprimorar o mecanismo de obten??o de comp?sito de matriz cer?mica (CMC) baseado em SiOC/Al2O3/TiC pela pir?lise de um polissiloxano em presen?a de cargas ativa e inerte, em temperatura de pir?lise inferior ? usualmente adotada para essa t?cnica, com maior resist?nci mec?nica. Tamb?m se investiga a influ?ncia da temperatura de pir?lise, do teor de Al como carga ativa, da presen?a de agentes infiltrantes (Al, vidro de La e pol?mero polissiloxano) p?s-pir?lise, da temperatura e do tempo de infiltra??o sobre algumas propriedades f?sicas e mec?nicas. A alumina ? utilizada como carga inerte e Ti e Al como carga ativa na pir?lise. Alum?nio, vidro de La e um polissiloxano s?o utilizados como agentes infiltrantes p?s-pir?lise. Os materiais obtidos foram analisados com rela??o ? porosidade e densidade aparente pelo m?todo de Arquimedes, a presen?a de fases cristalinas por difratometria de raios-X (DRX) e a microestrutura por microscopia eletr?nica de varredura (MEV). Os corpos cer?micos pirolisados entre 850 ?C 1400 ?C apresentam porosidade de 15 -33%, densidade de 2,34 2,62 g/cm3 e resist?ncia mec?nica ? flex?o em 4 pontos de 30 -42 MPa. A microestrutura apresentou-se porosa, com uma matriz de Al2O3 refor?ada por part?culas de TiC e AlTi3. A infiltra??o p?s-pir?lise revelou redu??o da porosidade e incremento da densidade, dos corpos infiltrados, em torno de 20% e da resist?ncia mec?nica em torno de 40%, com o Al e o pol?mero agindo mais eficazmente como agentes infiltrantes, sob v?cuo. As propriedades mec?nicas de comp?sitos processados sem press?o de compacta??o se apresentaram equivalentes ?quelas de algumas literaturas em que se utilizou press?o de compacta??o e retra??o linear de apenas 2%, bem. Os comp?sitos obtidos apresentam potencial de aplica??o onde estabilidade t?rmica ? o principal requisito.
Novák, Radomír. "Návrh malé víceúčelové nádrže v k.ú Velké Albrechtice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226858.
Повний текст джерелаChen, Chih-Chung, and 陳志忠. "Water Infiltration in Shallow Soils in Janghauh Area." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/60239544193094009265.
Повний текст джерелаJOU, SHEAU-WEN, and 周曉雯. "Evaluation on the Infiltration Rate of Paddy Field in Yun-Lin Area." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/00346775571594767314.
Повний текст джерела國立臺灣大學
農業工程學系
85
Flooded paddy field exhibits productive,ecological and environmental multi-functions.Since the paddy field has long term ponded with water,it becomes one of the major sources for groundwater recharge. The purpose od the study is to quantity the amount of annualinfiltration and to locate the potential recharge area with the help of a GeographicalInformation System from paddy rice field in Yun-Lin.The result is useful to the government for planning and management of groundwater resources. A one-dimensional,Darcy-based soil/water balance model SAWAH and an empiricaleqaution used by Taiwan Provincial Water Conservancy Bureau are an adopted to estimatethe quantity of infiltration from the paddy field in Yun-Lin.A ten centimeter thicknesshard pan soil with 0.03cm/day hydraulic conductivity is selected to analyze the irrigateddata from Shan-Shin group,Mayan station in Yun-Lin. The simulated result from SAWAH model shows the flux infiltrating into hard pan rangesfrom 0.1821 to 0.1858 billion cubic meters annually.The infiltration estimated from empirical equation ranges from 0.337 to 0.3891 billion cubic meters per year whichis two times larger than the result from model simulation.The empirical equation is designed to estimate the amount of irrigation water for rice grow up in the paddyfield and may be over-estimated.To accurately evaluate the annual infiltration fromirrigated paddy field,two-dimensional model simulation with detailed hydraulic conductivity data of hard pan soil are suggested to carry out in the future.
Chien, Shih-Tun, and 簡士惇. "The effect on rainfall infiltration of slope stability - A case study in Lugu Area." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/5d9nd4.
Повний текст джерелаLee, Yu-sheng, and 李宇陞. "Numerical assessments of infiltration efficiency for gravel piles installed in detention ponds in metropolitan areas." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/15972634125551438648.
Повний текст джерела國立中央大學
應用地質研究所
103
The development of metropolitan leads to creasing impermeable surface areas, which therefore induce the risk of flooding in storm seasons. Installing gravel piles in the open areas such as parks or detention ponds in metropolitan areas provides alternatives to increase the infiltration of storm water. The objectives of the study are to quantify the infiltration efficiency of gravel piles installed in a retention pond. The numerical FEMWATER model associated with field and laboratory experiments are employed to assess the improvements of infiltration influenced by the number of gravel piles. The study area is located in the industrial park in Taichung Dali district. In this study, the pressure plate extractor and falling head tests were used to obtain the soil water characteristic curves and the saturated hydraulic conductivity K. Those soil characteristics parameters, saturated Hydraulic Conductivity and digital elevation model, will then employed in the FEMWATER numerical model for modeling Infiltration scenarios on different scales. A number of conditions, including different ponding depths in detention pond, hydraulic conductivity values, groundwater levels, and numbers and distances of gravel piles were used in the FEMWATER model to quantify the effects of the factors on the infiltration. Based on the van Genuchten soil characteristic formula, the results of pressure plate extractor test show that the soil sample has saturated soil volumetric water content of 0.358 (-), residual soil volumetric water content of 0.067 (-),the air entry suction of 0.643 (1/L), and the pore-size distribution of 1.556 (-). The saturated K is 0.6 (m/day) based on the in-situ infiltration experiment. The numerical simulations indicate that the infiltration is mainly controlled by hydraulic conductivity and the flooding depth in detention pond. Simulation results also show that the distance between two gravel piles didn’t have significant influences on infiltration rate when the distance is longer than 1 m. One gravel pile in gravel piles’ scaling model made can lead to 2% of increased infiltration compared with the no gravel pile condition. In the study area, the existing three gravel piles can increase the infiltration up to 0.375%.
Huang, wei-che, and 黃偉哲. "Field Experiment and Numerical Simulation on the Infiltration of Paddy Field in Ten-Chung Area." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/41073717595715993263.
Повний текст джерела國立臺灣大學
農業工程學研究所
87
Flooded paddy field exhibits productive, ecological and environmental multifunctions. Since the paddy field has long term ponded with water, it becomes one of the major sources for groundwater recharge. The Choshuchi Alluvial Fan is an important area for groundwater recharge. This study conducts the field experiment and numerical simulation of flooded paddy field in Ten-Chung. The experimental methods are to take a sample of soil, to observe the water content of soil and infiltration in suit and soil analysis, unsaturated curve experiment in laboratory. The data of soil characteristics/hydraulic parameter are used to calibrate the simulation model. The FEMWATER model is adopted to simulate infiltration and groundwater recharge. The GMS software is used to structure the parameter and model . The numerical simulation can establish the relationship between the lateral and vertical infiltration. According to the simulation result, the simulation area is 262506 m2, the based infiltration of the experimental field in Ten-Chung is 3.86 mm/day, the vertical recharge of groundwater is 30713.23 cubic meter and the lateral percolation is 303.1226 cubic meter with plow sole. If there is no plow sole, the vertical recharge of groundwater is 52763.755 cubic meter and the lateral percolation is 913.03 cubic meter. Since it is useful to break the hard pan to increase the groundwater recharge. For regional flooded paddy field, the movement of infiltration water is mainly vertically downward in most area, The lateral movement is obviously occur on the wet to dry boundary. The vertical recharge rate is 2~10 times higher than the horizontal movement of water for wet to wet paddy field boundary condition and 1/10 for the wet to dry paddy field boundary condition. The mainly return water is the lateral percolation for wet to dry paddy field boundary.
Chiu, Yu-Feng, and 邱羽鳳. "The Establishment of a Management Index System for Rainwater Storage/Infiltration Facilities in Urban Area." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/vq7ecn.
Повний текст джерелаSu, Jeng-Yen, and 蘇正炎. "Influences of Different Landuses on Infiltration and Water Quality at Slopeland Area along ALI-shan Highway." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/91401986731208756230.
Повний текст джерела國立中興大學
水土保持學系
86
ABSTRACT The objective of this study was to examine the influences of different landuses and water quality at slopeland area along Ali-shan highway . The experiments were carried out to compare the differences in infiltration, soil physical and chemical properties, water quality at sites with various covers(forests, bamboo, tea, betel-nut marstard) 1.The final infiltration rates for the different agricultural crops planting areas are compared as follows: (1)Forest District #3: forest>marstard. (2)Forest District #7: forest>marstard. (3)Forest District #146: bamboo>tea bare ground. (4)Forest District #151: forest>betel-nut>tea. 2.The regression equations relating infiltration rates(mm/min) are listed below: (1)Forest District #3: forest: F = 6.714 + 7.103 * e-0.0302t marstard: F = 2.010 + 2.865 * e-0.0896t (2) Forest District #7: forest: F = 6.310 + 7.895 * e-0.0420t marstard: F = 1.897 + 3.305 * e-0.0221t (3) Forest District #146: bamboo: F = 7.343 + 18.413 * e-0.0248t tea: F = 5.945 + 16.890 * e-0.0480t bare ground: F = 1.238 + 4.835 * e-0.0578t (4) Forest District #151: forest: F = 14.179 + 5.846 * e-0.0200t bamboo: F = 13.335 + 6.398 * e-0.0177t betel-nut: F = 5.418 + 19.327 * e-0.0428t tea: F = 2.406 + 9.008 * e-0.0493t 3.The water regulation capacities of soils as related to macropore contents, are compared for various landuses as follows: forest>bamboo>betel nut>tea> marstard 4.Planting of agricultural crops caused degradation of water. This is especially true for marstard site with E.C., total P and COD of water significantly higher than those from forest sites. Keywords: Ali-shan highway ,landuses ,infiltration rate,water quality,betel-nut,,marstard
YE, JHIH-SIN, and 葉芷歆. "Investigate for Drainage of Infiltration in the Slope of the Collapsed Rock of Chai-Shan Area." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/4m28ep.
Повний текст джерела國立高雄第一科技大學
營建工程系碩士班
106
There are many collapses and cracks in the section of Chai-shan Community. During the flood season, the rainwater utilization cracks are infiltrated into the surface and surface runoff through the characteristics of high porosity. The rainwater accumulates on the soil rock interface, and the soil water content starts from the soil rock interface. The increase, coupled with the surface runoff, makes the water content of the surface of the slope and its shallow layer increase, and if the mudstone is infiltrated in the rain for a long time, it is easy to disintegrate, and if it is not effective for the Chaishan community If the drainage is improved, it may slip due to insufficient soil carrying capacity. In this study, a three-dimensional numerical simulation tool-PLAXIS 3D was used to model the soil parameters with the topographic map and stratigraphic drilling data of the Chaishan community, and the rainfall data of the Meiji typhoon in 2016 was used as the rainfall condition to explore the actual typhoon rainfall. In the case of actual typhoon rainfall, the drainage method of the slope of Chaishan community is set up below the slope to set up the water collecting system in the direction of water flow in the catchment area to explore whether the distribution of the fan-shaped horizontal drain to the Chaishan community will be due to the water collecting pipe. The length affects the soil moisture content and water level leakage of the slope, and compares its water collection effect. The research results show that the time to enter the stable high saturation state at the position B is earlier, which may be due to the shallower thickness of the collapse layer under the community. Therefore, the soil saturation increases faster during rainfall, and if it is below The faster the water content of the slope soil reaches a stable value, the faster it spreads to the upper slope. In addition, the result of the horizontal drain is compared with the case of no rainfall, and the position A is set to be underwater under different lengths, and the water collecting effect of the horizontal drain 30 meters is better, but the setting position B is not because of the length of the horizontal drain. The reason is that the change is because even if a long horizontal drain is set, if the soil moisture has been pumped out and the water level has not reached the pumping elevation, the water collecting cannot be effectively performed. Therefore, the soil saturation and the water level drop degree of the position B are similarly changed.
Hsu, Chia-Chi, and 許嘉琦. "The Efficiency Evaluation for The Treatment of Household Sewage by a Subsurface Wastewater Infiltration System – Taking Yingge town-Yue Lun Barracks Area as An Example." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/47616884246718844738.
Повний текст джерела國立臺灣大學
環境工程學研究所
94
The results in this study show that this system exhibits satisfactory reduction efficiency in BOD, NH3-N and T-P. However, its performance for SS is relatively poor. Although the overall reduction rate is not that outstanding, the effluent after the treatment with this system can meet most criteria of the Effluent Regulation Limits set by EPA Taiwan. It reveals that this system do have potential in depleting pollutants from the household sewage. The input concentration of effluent is closely related with the reduction rate. Also, there is an interdependent relationship between the pollution loading and the reduction amount. It implies that, within assimilative capacity of the system, a higher pollution loading will generally results in a better reduction rate. While this system may not be suitable for the metropolitan areas in Taiwan for their high density of population and land utilization, but it does work well in the remote areas such as the suburb, village and so on, where there are no sewage sewer system available. It may act as a substituting treatment facility for the household sewage. Also, as this system is installed in the underground, for the cases that larger land is available and light development is permitted, it is possible to cultivate the lands for amusement parks, agricultural pastures, schools and so on while leave the function of the major objects undisturbed.
Zabłocki, Sebastian. "Scenariusze zagrożenia wód podziemnych związkami azotu na terenach rolniczych na przykładzie zlewni Osownicy (Dorzecze Liwca)." Doctoral thesis, 2013. https://depotuw.ceon.pl/handle/item/285.
Повний текст джерелаOyiboka, Ifeoma Jennifer. "Effects of landfill sites on groundwater quality in Igando, Alimosho Localgovernment Area, Lagos state." Diss., 2014. http://hdl.handle.net/10500/18733.
Повний текст джерелаEnvironmental Sciences
M. Sc. (Environmental Science)