Pervious pavements in car parks and driveways reduce peak discharge and the volume of runoff flowing in to urban drains and improve the water quality by trapping the sediments in the infiltrated water. This reduces the risk of pollutants such as suspended solids and particle bound chemicals such as phosphorous, nitrogen, heavy metals and oils and hydrocarbons entering receiving waters. The key objectives of the study are to establish relationships between rainfall and pervious pavement runoff and quantify improvements to infiltrated stormwater quality through the pervious pavement. The field experimental results were used to calibrate the PCSWMMPP model and to develop water flow and quality improvement transfer functions of the MUSIC model for concrete block and turf cell pavements. The research reported herein has demonstrated that pervious pavements can be introduced as a sustainable stormwater management initiative and as a key Water Sensitive Urban Design feature to deliver numerous benefits to the environment. The outcomes from the study will be useful in designing environmentally friendly car parks, pedestrian paths, light traffic drive ways, sporting grounds and public areas in the future. Land developers and local government authorities will be major beneficiaries of the study which has increased the understanding of the use of pervious pavements and explored a number of issues that previously inhibited the wider use of pervious pavements in practice.

Thesis (M. A.)--University of Hong Kong, 2006. / Title proper from title frame. Also available in printed format.

Šiame darbe nagrinėjama požeminio vandens kokybės dinamika skirtinguose Lietuvos regionuose. Pagrindinė požeminio vandens kokybės stebėsenos (monitoringo) užduotis yra kaupti ir vertinti informaciją apie ilgalaikius požeminio vandens išteklių būklės kitimus dėl gamtinių ir antropogeninių veiksnių.. Požeminio vandens kokybės analizei buvo pasirinkti Karajimiškio, Išdagų, Zelvės, Digraičių postų stebėjimo gręžiniai. Duomenų analizė parodė, kad požeminio vandens tarša priklauso nuo dirvožemio granuliometrinės sudėties, požeminio vandens slūgsojimo gylio, kritulių kiekio, žemėnaudos. Karajimiškio posto, kuris yra šiaurės Lietuvos sulfatinio karsto regione, požeminiame vandenyje visais analizuojamais metais nustatyta didžiausia bendroji mineralizacija ir didžiausia sulfatų koncentracija. 2005 metais Zelvos posto gręžinyje nitratų koncentracija viršijo didžiausią leistiną nitratų koncentraciją (50 mg/l). / The main aim of these researche is to investigate the dinamics of underground water quality in different Lithuanian regions. The quality of underground water can diferent means be watched – one of them is underground water monitoring. The main target of underground water monitoring is to hill up and estimate information about changes of long duration underground water stock conditions due to natural and antropogenics factors. Pollutant migration through the soil zone depends namely on depth of waterlogging, texture, organic matter content, quantity of precipitations. Differences in the concentrations of chemical composition of groundwater depend mostuly on well ambience. Maximum permissible concentration (50 mg/l) of nitrates was exceeded only in Zelve monitoring well in 2005.

Automatic river quality monitoring (ARQM) is potentially an important tool in water quality management for the National Rivers Authority (NRA) and similar organisations worldwide. The information produced by ARQM systems must be used in the most effective way and fully integrated with the manual monitoring effort. The status and development of ARQM systems in the freshwater and estuarine River Thames catchment are discussed and a practical appraisal of the design, operation and maintenance requirements given. Data capture, verification and presentation methods are developed and the use of ARQM data for real time management and subsequent analysis is advocated. Examples of data from the freshwater ARQM system are given which emphasise the variability of freshwater quality and the need for a comprehensive understanding of the behaviour of rivers before management decisions are made. The use of ARQM data for assessing the compliance of rivers with River Quality Objectives is examined. With respect to the tidal Thames, data processing methods to correct for the tidal movement of the waterbody are developed. ARQM data are used to highlight the principal factors affecting the water quality of the tidal Thames. The importance of the use of ARQM information in the effective management of the tidal Thames is discussed and operational examples demonstrate how it may be utilised as a basis for management decisions. The application of ARQM to the sub-tropical environment of the River Ganges, India, is investigated. An ARQM system has been designed and prototypes are operational. Extensive site surveys were carried out and the water quality status of the Ganges is discussed. Recommendations for the improvement and future development of ARQM systems are made. The use of ARQM information and its potential for improving the management of rivers is discussed.

Thesis (M.E.S.)--The Evergreen State College, 2007. / Title from title screen (viewed 3/27/2008). Includes bibliographical references (leaves 51-52).

Diss. (sammanfattning) Uppsala : Sveriges lantbruksuniv., 2004. / Härtill 6 uppsatser.

Thesis (M.Env.St.)--University of Adelaide, Mawson Graduate Centre for Environmental Studies, 2000. / Bibliography: leaves 84-91.

Thesis (Ph.D.) -- University of Adelaide, School of Earth and Environmental Sciences, Discipline of Ecology and Evolutionary Biology, 2008. / "December 2007" Bibliography: pages 172-185. Also available in print form.

Thesis (M.S.P.H.)--University of Michigan, 1939.

Thesis (Ph. D.)--University of North Texas, Dec., 2007. / Title from title page display. Includes bibliographical references.