The Arizona Oil and Gas Commission in conjunction with the Arizona Geological Survey have collected a large amount of data for the oil and gas wells in the State of Arizona. The data covers over 1,000 wells that were drilled from the 1940s to present. This data includes copies of permits, location information, scanned copies of well logs and digitized versions of the well logs in .las file format. These files have been difficult to distribute efficiently because of an unfriendly web user interface. The purpose of this project is to give the Arizona Geological Survey a way to distribute the oil and gas well data through an effective web application. The web application will leverage existing web services at the Arizona Geological Survey. To create this map I used the Esri JavaScript API. In this application the users can select multiple wells by clicking and dragging over the well heads they want. This will then display the metadata in a grid along with hyperlinks to the available files for those wells. This data will be primarily used by companies involved with carbon sequestration or others seeking information for geological exploration.

This paper is focused on evaluation and improvement of the allocative efficiency of the public sector. The introductory chapters give us information about the necessity of existence, operation and financing of the public sector and its representation in public finances. Rules for establishing, financing and management of semi-budgetary organizations are discused in a more elaborated manner. The theoretical part explains the concept of efficiency and provides a detailed overview of methods of measuring the efficiency in the public sector by various authors. In the practical part, the theoretical approaches are demonstrated on the example of the Czech Geological Survey (ČGS). ČGS is a semi- budgetary organization established by the Ministry of the Environment, but partly also works as a research organization. Also there are given the competences and organizer's requirements. Financing of the organization is provided from several sources, whereas the contribution from the organizers part is reduced on a year to year basis and the organization is forced to cover the loss by research activities and providing services to foreign customers. The effectiveness analysis is based on the concept of Sintonen. However it is complicated by the fact that ČGS is on one hand A semi-budgetary organization and on the other A research organization. For the semi-budgetary organizationS the appropriate approach is to minimize costs, but for the research organization it is rather about increasing revenues. For the highest efficiency possible it is necessary to find a combination of both approaches.

The thesis deals with slope stability of a landslide "U Čtrnácti pomocníků", which is located in the north-eastern part of the city Semily in the Liberec district. The thesis is divided into theoretical and practical part. The theoretical part was carried out literature search on the issue and the natural conditions around the wider area of interest. The practical part consists of individual sections within which the research were conducted archival documentation, mapping areas of interest, own technical work, sampling and geophysical measurements and laboratory work and stability calculations. Also the engineering geological model of the landslide was created. The results of the practical part are used as the basis for the final engineering geological evaluation of this area.

No description available.

This dissertation is an analysis of systematic studies of the land in the early American Republic, from the 1790s to the 1840s; more specifically, it explores the role scientific and technical practices played within that era's improvement ethic. I argue that science, as seen through the lens of agricultural chemistry and, to a lesser extent, geology, became an important, acceptable, and credible way to interact with early Republic land because it fit within the multivalent improvement ethic of that period. Through a study of the agricultural press, farmers’ diaries, and county and statewide scientific surveys, I examine how scientific and technical practices aided agricultural improvement, how they were promoted or resisted by local farmers, and in what ways they gained social credibility for interpreting and interacting with agrarian nature. Part I, “The Place of Science,” explores how science was interpreted by people. I there ask about the social, moral, instrumental, and literary places of agricultural science in rural culture. Part II, “The Science of Place,” asks instead how science interpreted the land, there studying county and state scientific surveys in Virginia. Underlying the entire work is an exposition of the georgic ethic (as distinct from the pastoral ethic), which emphasizes the labor-based means through which most rural peoples understood their land and ties the moral plea for cultural improvement to the material pursuit of agricultural progress. The story herein introduces the production of an important set of conditions that allowed later scientific developments across the land to have meaning and significance: forms of communication, precedents of organization, field-tested modes of analysis, a tradition of improvement and experimentation, the long-standing search for solutions to soil exhaustion, increasingly mechanistic philosophies of soil composition, a market force to drive all of these, and a unique American political and agricultural environment into which the above could take shape. The lesson is not that the entirety of our modern scientific worldview can be traced to the activities of a disgruntled antebellum American farming class, but that this example of rural science and agricultural improvement provides a fruitful example of what it takes to make a scientific worldview. Thus, arguments about philosophical and conceptual bases for scientizing the land–topics of great importance in the fields of environmental history and various branches of science and technology studies–gain strength and plausibility by reference to the workings of antebellum agents who first argued over the value of using science to define their land. By putting the circulation of agricultural science in the context of early Republic improvement-minded agents, we can better locate agrarian American culture into a post-Enlightenment setting, we are better equipped to recognize how everyday citizens came to treat scientific practices as legitimate means of interacting with their lands, and we have a more developed picture of how morality, materiality, and theory were wedded in the much-revered principles of practice and practicality. The sum of those points highlights how traditional means of managing the land, as with religious doctrine, almanac strictures, the lessons inherited through family lineage by generations of daily practice, or uncodified folk knowledge in general, were being complemented with or displaced by organized, methodical, and systematic–eventually, scientific–practices on the land. / Ph. D.

Made available in DSpace on 2015-03-13T17:08:11Z (GMT). No. of bitstreams: 1 JoseCC_capa_ate_secao3.pdf: 3390539 bytes, checksum: e36b06104b1fa7652edaacc92ff9073f (MD5) Previous issue date: 1999-06-28 / The studied area is geologically located in the Northern Domain of the Borborema Province (Northeast Brazil), limited to the south by the Patos shear zone. Terranes of the Jaguaribeano system are dominant, flanked by the Piranhas (E and S sides) and Central Cear? (NE side) terranes. Its basement comprises gneiss -migmatite terrains of Paleoproterozoic to Archean age (2.6 to 1.9 Ga old), overprinted by neoproterozoic to cambrian tectonotherma l events. Narrow supracrustal belts ( schist belts) display a 1.6 to 1.8 Ga age, as shown by whole - rock Rb-Sr and zircon U-Pb and Pb/Pb dates in acid metavolcanics which dominate in the lower section of these sequences, and in coeval metaplutonics (granitic augen gneisses). From the stratigraphic point of view, three Staterian belts are recognized: 1. Or?s Belt - made up by the Or?s Group, subdivided in the Santar?m (predominantly pure to impure quartzites, micaschists and metacarbonates) and Campo Alegre (metandesites, metabasalts, metarhyolites and metarhyodacites, interlayered with metatuffs and metasediments) formations, and by the Serra do Deserto Magmatic Suite (granitic augen gneisses). 2. Jaguaribe Belt - its lithostratigrahic-lithodemic framework is similar to the one of the Or?s Belt, however with a greater expression of the volcano -plutonic components (Campo Alegre Formation and Serra do Deserto Magmatic Suite). The Peixe Gordo Sequence, separately described, is also related to this belt and contain s metasedimentary, metavolcanic (with subordinated volcanoclastics) and metaplutonic units. The first one correlated to the Or?s Group and the latter the Serra do Deserto Magmatic Suite. 3. Western Potiguar Belt - represented by the Serra de S?o Jos? Gro up, subdivided in the Catolezinho (biotite -amphibole gneisses with intercalations of metacarbonates, calcsilicate rocks, amphibolites and quartzite beds to the top) and Minhuins (quartzites, micaschists, metaconglomerates, calcsilicate rocks, acid to the b asic metavolcanics and metatuffs) formations. Its late Paleoproterozoic (Staterian) age was established by a Pb/Pb date on zircons from a granitic orthogneiss of the Catolezinho Formation. The petrographic characteristics and sedimentary structures of the Santar?m Formation of the Or?s Group point to deltaic to shallow marine depositional systems, overlain by deep water deposits (turbidites). The geodynamic setting of this region encompassed a large depositional basin, probably extending to the east of the Portalegre shear zone and west of the Senador Pompeu shear zone, with possible equivalents in the Jucurutu Formation of the Serid? Belt and in the Cear? Group of central Cear?. The Arneir?z Belt, west Cear?, displays some stratigraphic features and granito ids geochemically akin to the ones of the Or?s Belt. The evolutionary setting started with an extensional phase which was more active in the eastern part of this domain (Western Potiguar and part of the Jaguaribe belts), where the rudite and psamite sedime ntation relates to a fluviatile rift environment which evolved to a prograding deltaic system to the west (Or?s Group). The basaltic andesitic and rhyolitic volcanics were associated to this extensional phase. During this magmatic event, acid magmas also crystallized at plutonic depths. The Or?s Group illustrates the environmental conditions in the western part of this domain. Later on, after a large time gap (1.6 to 1.1 Ga), the region was subjected to an extensional deformational episode marked by 900 Ma old (Sm-Nd data) basic rocks, possibly in connection with the deposition of the Cachoeirinha Group south of the Patos shear zone. In the 800 to 500 Ma age interval, the region was affected by important deformational and metamorphic events coupled with in trusion of granitic rocks of variable size (dykes to batholiths), related to the Brasiliano/Pan -African geotectonic cycle. These events produced structural blocks which differentiate, one from the other, according to the importance of anatectic mobilizatio n, proportion of high-grade supracrustals and the amount of neoproterozoic -cambrian granitoid intrusions. On this basis, a large portion of the Jaguaretama Block/Terrane is relatively well preserved from this late overprint. The border belts of the Jagua retama Block (Western Potiguar and Arneiroz) display kyanite-bearing (medium pressure) mineral associations, while in the inner part of the block there is a north-south metamorphic zoning marked by staurolite or sillimanite peak metamorphic conditions. Regarding the deformations of the Staterian supracrustal rocks, second and third phases were the most important, diagnosed as having developed in a progressive tectonic process. In the general, more vigorous conditions of PT are related to the interval tardi - phase 2 early-phase 3, whose radiometric ages and regional structuring indicators places it in the Brasiliano/Pan-African Cycle. In the Staterian geodynamic setting of Brazilian Platform , these sequences are correlated to the lower Espinha?o Supergroup (p.ex., Rio dos Rem?dios and Paragua?u groups, a paleproterozoic rift system in the S?o Francisco Craton), the Ara? and Serra da Mesa groups (north of Goi?s, in the so -called Goi?s Central Massif), and the Uatum? Group (in the Amazonian Craton). Granitic ( augen gneisses) plutonics are also known from these areas, as for example the A-type granites intrusive in the Ara? and Serra da Mesa groups, dated at 1.77 Ga. Gravimetric and geological data place the limits of the Jaguaribeano System (terranes) along the Senador Pompeu Shear Zone (western border) and the Portalegre- Farias Brito shear zone (eastern and southern). However, the same data area not conclusive as regards the interpretation of those structures as suture of the terrane docking process. The main features of those shear zones and of involved lothological associations, appear to favour an intracontinental transpressional -transcurrent regime, during Neoproterozoic-Cambrian times, marking discontinuities along which different crustal blocks were laterally dispersed. Inside of this orogenic system and according to the magnetic data (total field map), the most important terrane boundary appears to be the Jaguaribe shear zone. The geochronological data, on some tectonostratigraphic associations (partly represented by the Cear? and Jucurutu groups), still at a preliminary level, besides the lack of granitic zonation and other petrotectonic criteria, do not allow to propose tectonic terrane assembly diagrams for the studied area / A ?rea envolvida nesta disserta??o de mestrado encontra -se situada, geologicamente, no chamado Dom?nio Setentrional da Prov?ncia Borborema (P B), Nordeste do Brasil, tendo como marcador meridional a Zona de Cisalhamento Patos. Envolve, preferencialmente, terrenos do Sistema Jaguaribeano, ladeados pelos terrenos ( maci?o ) Rio Piranhas, com posicionamentos no leste e sudeste, e Tr?ia (Tau?) no nordeste. Compreende um espa?o de crosta continental dominada por terrenos gn?issico - migmat?ticos de idades paleoproteroz?ico -arqueanos (1.9 a 2,6 Ga), onde processos tectonotermais neoproteroz?ico-cambrianos s?o registrados em cada ponto, desde simples imprint t?rmico at? como gerador de radicais modifica??es estrutural -mineral?gicas e de leucossomas. Ao n?vel vestigial de antigas e amplas coberturas vulcanossedimentares, acontecem estreitas faixas supracrustais ( schist belts), cuja cronologia, com base em determina??es Rb-Sr, U-Pb e Pb-Pb nos metavulcanitos ?cidos, dominantes na se??o inferior das seq??ncias, e nas metaplut?nicas associadas (augen gnaisses), se situa entre 1,6 e 1,8 Ga. Estratigraficamente, essa faixas, paralelizadas num mesmo intervalo cronol?gico (Estateriano), podem ser sumariadas da seguinte forma: 1. Faixa Or?s (FO) - constitu?da pelo Grupo Or?s, subdividido nas forma??es Santar?m (predominantemente quartzitos puros e impuros, micaxistos de granulometria fina a grossa e metacarbonat os) e Campo Alegre (metandesitos, metabasaltos, metariolitos, metariodacitos e intercala??es de metatufos e metassedimentos), e pela Su?te Magm?tica Serra do Deserto ( augen gnaisses gran?ticos). 2. Faixa Jaguaribe (FJ) - ostenta caracteriza??o litoestra tigr?fico-litod?mica similar a de Or?s, com maior expressividade superficial dos componentes vulcano plut?nicos (Forma??o Campo Alegre e Su?te Magm?tica Serra do Deserto). Tamb?m relacionada a essa faixa e descrita separadamente, encontra -se a Seq??ncia Peixe Gordo, constitu?da por unidades metassedimentares, metavulc?nicas (vulcanocl?sticas subordinadas) e metaplut?nicas, as primeiras correlacion?veis ?s forma??es do Grupo Or?s e a ?ltima a Su?te Magm?tica Serra do Deserto. 3. Faixa Extremo Oeste Potigua r (FEOP) - representada dominantemente por rochas do Grupo Serra de S?o Jos?, subdividido nas forma??es Catolezinho (dom?nio de biotita - anfib?lio gnaisses, com intercala??es de metacalc?rios, rochas calciossilic?ticas, anfibolitos, e camadas quartz?ticas n o sentido ao topo) e Minhuins (quartzitos diversos, micaxistos, metaconglomerados, rochas calciossilic?ticas, metavulc?nicas ?cidas, intermedi?rias e b?sicas, e metatufos). Sua cronologia paleoproteroz?ica superior (Estateriano) foi estabelecida a partir d e uma determina??o Pb-Pb em cristais de zirc?es de ortognaisses gran?tico da Forma??o Catolezinho. Por sua vez, os augen gnaisses que ocorrem pelo lado oriental dessa FEOP, com rela??es de intrus?o em rochas da forma??o inferior, foi admitido, preliminarme nte, como cronocorrelatos a litotipos similares das outras faixas. As caracter?sticas petrogr?ficas e de estruturas sedimentares da Forma??o Santar?m (Grupo Or?s), permitem inferir sistemas deposicionais delt?icos e par?lico -marinho raso, sendo recoberto por sedimentos de ?gua profunda (turbiditos). Em termos geodin?micos, a regi?o pode ser modelada como uma ampla bacia deposicional, com prov?vel extens?o para leste da Zona de Cisalhamento Portalegre e oeste da Zona de Cisalhamento Senador Pompeu, provave lmente com registros em parte das rochas inseridas na Forma??o (Grupo) Jucurutu e no Grupo (Complexo) Cear?. Ainda, pelo lado oeste, a Faixa Arneir?z exibe alguns indicadores estratigr?ficos e de litoqu?mica de granit?ides que a faz similar a de Or?s. Esse ambiente inicia-se com uma fase extensional mais ativa pelo lado oriental (Faixa Jaguaribe, pr?-parte, e Extremo Oeste Potiguar) onde a sedimenta??o ? dominada por psamitos, ruditos, marcando f?cies de ambiente fluvial de um sistema rifte que evoluiu para um sistema delt?ico progradante a oeste (Grupo Or?s). Associados a essa fase extensional, ocorreram epis?dios de vulcanismo bas?ltico -andes?tico a riol?tico. Durante esse desenvolvimento vulcanossedimentar, num cen?rio intracontinental ocorreu a gera??o de magmas ?cidos que foram cristalizados sob condi??es hipoabissais e plut?nicas. Pelo lado oeste, a sedimenta??o teve aquelas caracter?sticas ambientais descritas para o Grupo Or?s. Subseq?entemente, transcorrido um longo intervalo de tempo (1,6 - 1,1 Ga, com registros mais pr?ximos no Dominio Tect?nico Central da PB), a regi?o foi solicitada por uma fase extensional, possivelmente associada ao desenvolvimento da ambi?ncia vulcanossedimentar do Grupo Cachoeirinha (sul da Zona de Cisalhamento Patos), marcada na regi?o de Or?s por corpos b?sicos de idades em torno de 900 Ma (Sm -Nd). No intervalo de 800-500 Ma, a regi?o atravessou por importantes fases de deforma??o, metamorfismo e de incorpora??o de magmas gran?ticos (cristalizados em espa?os de dimens?es variadas, de diques a batol?ticas) e b?sico -intermedi?rios, relacionadas ao chamado Ciclo Geotect?nico Brasiliano/Pan -Africano. Atualmente, alguns autores admitem como marcas sedimentares desses tempos, localizadas em tratos da ?rea cartografada e pr?ximos, as forma??es (Grupo) Serid?, Lavras da Mangabeira e Grupo Cear? (pr?-parte). Nesses tempos foram gerados blocos estruturais diferenciados ao n?vel da taxa de fus?o anat?tica, percentagem de supracrustais em alto grau e seus respectivos correspondentes migmat?ticos e participa??o de corpos gran?ticos neoproteroz?ico - eopaleoz?icos. Com esses indicadores, grande parte do Bloco/Terreno Jaguaretama ? a que ostenta menor atua??o relativa dos processos tectono -metamorfo-magm?ticos do mencionado ciclo. A despeito das faixas mais distantes desse Bloco Jaguaretama (Extremo Oeste Potiguar e Arneir?z), onde tem-se associa??es minerais com cianita (m?dia press?o), as faixas marginais ao mesmo, s?o marcadas por uma zoneografia sul -norte, onde passa-se do campo da estaurolita, para o da sillimanita. Internamente, o Grupo Or?s tem sua zona da estaurolita desenhada no lado oriental. Para as deforma??es das supracrustais estaterianas, as fases mais importantes foram as segunda e terceira, diagnosticadas como desenvolvidas n um processo tect?nico progressivo. No geral, condi??es de PT mais vigorosas s?o relacionadas ao intervalo tardi-Fase 2 cedo-Fase 3, cujos indicadores cronorradiom?tricos e de estrutura??o regional, o coloca no desenvolvimento do Ciclo Brasiliano/Pan -Africano. No cen?rio da geodin?mica estateriana do Brasil, essas seq??ncias vulcanossedimentares s?o cronocorrelacionadas ?s que constituem a se??o inferior do Supergrupo Espinha?o (p.ex., grupos Rio dos Rem?dios e Paragua?u, sistema rifte paleoproteroz?ico no Cr?ton S?o Francisco), ?s dos grupos Ara? e Serra da Mesa (no norte de Goi?s, implantados sobre o Maci?o Central de Goi?s) e Uatum? (no Cr?ton Amaz?nico). O plutonismo gran?tico ( augen gnaisses) tamb?m t?m similares nessas regi?es, como por exemplo os A-granitos intrusivos nos grupos Ara? e Serra da Mesa, com idades em torno de 1,77 Ga. Para os limites do Sistema (Terrenos) Jaguaribeano(s), os dados gravim?tricogeol?gicos favorecem o estabelecimento segundo as zonas de cisalhamentos (ZCs) Senador Pompeu, a oeste, e Portalegre-Farias Brito, a leste e sul. Contudo, os mesmos informes n?o s?o conclusivos quanto a exist?ncia dessas estruturas como registros de um processso de suturamento transformante (docagem de terrenos). Os principais caracteres dessas ZCs e dos conjuntos litol?gicos solicitados, apontam para um regime transcorrente-transpressivo intracontinental, inerente aos tempos do Neoproteroz?ico - Cambriano, marcando importantes charneiras de dispers?o direcional de blocos (fase de extrus?es laterais da tect?nica brasiliana). Dentro desse Sistema, conforme os dados aeromagn?ticos (mapa de campo total), o mais importante limite de terreno ? estabelecido na Zona de Cisalhamento Jaguaribe. O elenco dos dados cronorradiom?tricos, em n?vel bastante prel iminar, sobre algumas associa??es tectonoestratigr?ficas (em parte representadas pelos grupos Cear? e Jucurutu), al?m da car?ncia de uma zoneografia gran?tica e de outros desenhos petrotect?nicos, dificultam a proposi??o de diagramas de aglutina??o de terr enos na presente regi?o

The aim of this study is to investigate how employees at the Geological Survey of Sweden (SGU) and librarians at SGU and Uppsala university library (UUB) experience challenges and changes in the information provision for geologists at SGU after an organizational change of the library function at the survey. After the closure of the library at SGU in 2015 the survey buys some of their needed library service from UUB, while most of the SGU library collections are left at the survey. To investigate the experiences I conducted interviews with current and former geologists and former librarians at SGU and a librarian at UUB. I also investigated some key documents to provide a framework to the interviewee’s experiences, to compare this with the goals of the coordination between SGU and UUB, and to try and shed light on the role of the library within the survey. The study was based on a constructivist point of view where the interviewee’s experiences of the changes is in focus, giving a deeper understanding of their information needs and how they have been affected by the changes of the library function. I have looked at the changes in information provision for the employees at SGU as a result of changes in SGU’s library activities, that is, changes in the organization of SGU. The results were therefore analyzed using a combination of organizational theories on public administration and business concept approaches, which is motivated by how public administration has changed in recent decades. The results show that geologists at SGU rely heavily on old publications, grey literature and publications about Swedish conditions. This is opposed to what UUB offers in terms of ”hot science” and international literature to meet the needs of the researchers and students at Uppsala university. Also, since UUB only took over a small part of the collections from the SGU library as part of the agreement, the SGU employees have a significant need for help obtaining literature that is left at the former SGU library. As a result of the changes in information provision, the interviewed geologists at SGU feel that the closure of the library at SGU has had a negative impact on their work performance. Because of this they also feel that there is a contradiction between the regulation of the survey, which states that the main focus for SGU is to collect, manage and disseminate information, and the decision to close the library. The conclusions are that although the libraries at SGU and UUB both offer literature in the field of geology there are big differences in the kind of geological literature that the users need and what the different libraries can or could offer. In a larger perspective, this study can contribute to a deeper understanding of the role of special libraries and what can happen to the information provision when a library closes. This is a two years master’s thesis in Library and Information Science.

The thesis deals with the possibilities of presentation of geological information in the field of regional geology. The main aim of the thesis is to create the proposal of On-line Textbook in Regional Geology which can be used as a learning resource for universities, experts and all interested people. There had not been paid enough attention to the geology subject within the basic and secondary schools curriculum for last years. Geology was the part of other taught subjects. Nevertheless, there were initiatives that allowed to find new space for geology subject that has been realizing especially within frame educational programme at grammar schools. There are many resources that can be used during the educational process of regional geology such as traditional textbooks, expert compendiums, but also modern aplication in the form of internet projects. Unfortunatelly, current accesible web applications are not updated and do not include modern findings and knowledge. The proposal of On-line textbook represents the core topic of the thesis. This concept is being developed with the support of the Czech Geological Survey (CGS) in collaboration with the Faculty of Science at Charles University in Prague. There is the connection with CGS portal which is the main communication interface with the user. CGS portal...

Grundvatten och dess varierande nivåer kan potentiellt få en stor inverkan både på byggnaderoch dess omgivning och kan innebära risker som upplyftande krafter, skred och ras. Baseratpå detta är det av vikt att kunna förutsäga extrema grundvattennivåer, kallat dimensionerandegrundvattennivåer. Däremot görs sällan mätningar under en längre tid, vilket krävs för att fastställasannolikheten av en viss grundvattennivå. För att kunna prognostisera den dimensionerandegrundvattennivån har den så kallade Chalmersmodellen utvecklats. Modellen utgår från attsätta korta mätningar från ett grundvattenrör vid en observationsplats (observationsrör) i relation till en lång mätserie från ett grundvattenrör vid en referensplats (referensrör). Enligtmetoden ska val av referensrör baseras på att det är likartade förhållanden mellan de två platserna, att de ligger inom 50 km från varandra och att mätningar i referensröret utförts i mer än 20 år. Denna studie syftar att utreda med vilken tillförlitlighet som Chalmersmodellen kan prognostisera grundvattennivåer som kan förekomma inom en viss återkomsttid. Fokus är på hur valet av referensrör som är placerade vid olikartade hydrogeologiska förhållanden påverkar Chalmersmodellens resultat. Studien utförs som en fallstudie, med utgångspunkt i utbyggnaden av tunnelbanan i Stockholm vid Sockenplan och Station Sofia. Utgångspunkten i Chalmersmodellen är att använda grundvattennivåmätningar från observationsplatsen tillsammans med mätningar från en ostörd miljö vid en referensplats. Beräkningar görs genom att utföra databehandling och beräkningar i Python i enlighet med beskrivningar från Chalmersmodellen och utvärderas genom att jämföras mot en liknande metod kallad extremvärdesanalys. Karakterisering av platserna vid observationsrören och referensrören används för att utvärdera hur stor inverkan olika hydrogeologiska egenskaper (akvifertyp och topografiskt läge) har på beräkningarna av den dimensionerande grundvattennivån. Resultaten visar att Chalmersmodellen generellt underskattar dimensionerande grundvattennivåer. Modellen har även varierande storleksordning av noggrannheten och därmed är det svårt att fastställa förväntad noggrannhet med Chalmersmodellen. Studien visar även att om observationsrör och referensrör är placerade vid en sluten akvifer kan en högre tillförlitlighet förväntas och osäkerheten i tillförlitligheten tycks öka för öppna akviferer. Slutligen om referensrör och observationsrör väljs utifrån att likartade hydrogeologiska egenskaper och samvariation mellan respektive grundvattennivåer, kan högre precision förväntas enligt denna studie. / Groundwater can potentially have a great impact on both constructions and the surrounding areas, and high groundwater levels can involve risks such as uplifting forces and landslide. Due to these risks it is important to predict and estimate the probability of extreme groundwater levels. However, when the necessary long term measurements are not available alternative methods are needed, like the Chalmers model. The Chalmers model is used for calculating extreme ground water levels, by combining a short measurement series from an observation well with the data from a reference well. For the results to be as accurate as possible, the two wells must share similar characteristics. The aim of this study is to investigate the Chalmers model when predicting the groundwater level for a specific return period. Focus will be on how the choice of different reference wells, with different characteristics, will influence the accuracy of the model.  A case study will be conducted on two station sites (Sockenplan and Station Sofia) for the extension of the metro in the southern part of Stockholm, Sweden, upon which the Chalmer model will be implemented. The different characteristics of the obeservation and reference wells are tested to evaluate the accuracy of the model. The accuracy will be evaluated by using extreme value analysis as an alternative calculation model, assumed to be more precise, and compare the difference in extreme groundwater levels. The measurements used as reference in the Chalmers model are public data from The Geological Survey of Sweden, SGU, for groundwater levels. Data processing and calculations are performed in python. This study highlights the difficulties in determining the accuracy of the Chalmers model when predicting extreme groundwater levels, and no specific expected accuracy has been determined. Generally, the model appears to underestimate extreme grounwater levels. Furthermore, if the observation well and reference well are located by a confined aquifer and between inflow- and outflow areas, a higher precision can be expected. The uncertainty of the model increases with an unconfined aquifer. The results also imply that if the reference well and the observation well are selected based on similar hydrogeological characteristics, a covariation of groundwater levels over time and between highest and lowest level, a higher accuracy can be expected.

No description available.