FOSFOROMSÄTTNING INOM HÖRBYÅNS AVRINNINGSOMRÅDE / Phosphorus Turnover in the Watershed of the River Hörbyån
Lake Ringsjön in Scania, southern Sweden, has been very eutrophicated during a comparatively short time. In spite of advanced municipal waste water treatment for phosphorus removal, no improvements have been observed in lake water quality. The reasons are release of P from the sediments and an extremely large external loading on two of the basins […]
DIMENSIONERING AV PERKOLATIONSMAGASIN MED REGNENVELOPPMETODEN OCH MAXDYGNSMETODEN, Design of Percolation Basins with a Rain Envelope Method and the Max Day Method
The aim of the study has been to test the applicability of the so called Rain Envelope Method and the Max Day Method, respectively, for design of percolation basins. For a given depth the basin volume has to be designed to meet a certain required frequency of flooding. Flooding is defined as one or more […]
REMOVAL OF PHOSPHORUS AND RESIDUAL ALUMINIUM BY RECIRCULATING ELECTROLYSIS OF WASTEWATER
P removal from wastewater was examined by electrolysis in a recirculating closed water system employing alternating current with 0.0039 Hz frequency and Al electrodes. Adjusting pH to about 6 with HCl facilitated complete removal of P and residual Al
VATTENDATABEREDSKAP, Storage of waterdata for the future
To be prepared to handle the water problems for the future we must collect and store waterdata of different kind today. It is a difficult task to judge the necessary extent of that storage both regarding different variables and the frequency of the data collection
INFORMATIONSGAPET FORSKNING – TILLÄMPNING: HUR KAN DET MINSKAS? / How to Reduce the Information Gap between Research and Implementation?
The information gap between research and praxis is analysed with a background of the ongoing segmentation and specialization of human knowledge. The genesis of the information gap is analysed and applied on the Swedish water administration and Swedish water research. A way for reduction of the information gap is indicated in increased co-operation and interaction […]
HYDROLOGISKA FORSKNINGSBEHOV UNDER 90-TALET / Needs for Hydrological Research in the 1990’s
Environmental problems and technical systems in the society are fundamentally related to hydrology. Hydrology is a very comprehensive concept. In fact, there are at least ten independent disciplines within hydrology. Classical hydrology is a descriptive science with the water balance equation as almost the only means of quantifying computations. Hydrodynamics have now to some extent […]
KUNSKAPSFÖRSÖRJNING AV 2000-TALETS SVENSKA SAMHÄLLSPLANERING AVSEENDE VATTEN- KUNSKAPSBEHOV I ETT 20-ÅRS PERSPEKTIV
Hydrological knowledge is scattered in many central, regional and local authorities and with consultants and researchers. In spite of a tendency towards an integrated view on hydrological issues the different expertise units will probably remain in power also in the year 2000. The separate hydrological topics probably benefit from this situation. Data on surface water, […]
VATTENVÅRD ÅR 2000: BEHOVET AV HYDROLOGISK INFORMATION, Water Management in the Year of 2000: The Need of Hydrological Information
Due to more complicated pollution situations future water management needs more reliable data on transport of pollutants from a variety of sources – both from external sources (air, land, waste water etc.) and from internal sources (e g regeneration from sediments). A common base for estimates of pollution inputs from these sources is different types […]
HUR SYNEN PÅ HYDROLOGI VÄXT FRAM I SVERIGE, The development of a modern view of hydrology in Sweden
This paper aims at showing how a modern view of hydrology has developed in Sweden during the last thirty years. This is done by selecting some areas where Swedish research programmes have contributed to the development of the hydrological sciences, e.g. studies performed in so called representative basins, urban hydrological studies as well as research […]
AVVATTNING AV BRUNNSSLAM I STOCKHOLMS SKÄRGÅRD
Försök har utförts att avvattna och fosforfälla brunnsslam från Stockholms skärgård med hjälp av dels en Moos avvattningscontainer, dels en Reductor siltrumpress. För avvattningen har olika polyelektrolyter provats, och för fosforfällningen har järnklorid, aluminiumsulfat och Ekoflock använts. Undersökningen visar att fosforhalten kan sänkas från 50 mg/l till 1 a 2 mg/1, COD från 3 000 […]