Kemikaalisekoituksen vaikutus kartongin liimausasteen pienimittakaavaiseen vaihteluun

Tässä diplomityössä tutkittiin massaliimauksen stabiilisuutta kartonkikoneella ja himan sekoituskonseptin muuttamisen vaikutusta liimausasteeseen ja liimausasteen pienimittakaavaiseen vaihteluun konerullan sisällä. Koeajoista saadut tulokset olivat erittäin lupaavia. Koeajoissa annosteltiin hartsia kahdella eri TrumpJet™-installaatiolla. Ensimmäisessä koeajossa hartsi sekoitettiin kaikkiin kolmeen kerrokseen sakean massan syöttölinjaan, ennen pyörrepuhdistuksen vaatimaa laimennusta. Toisessa koeajossa hartsi annosteltiin kolmella TrumpJet-suuttimella kartongin pintakerrokseen konesihdin jälkeen ja muihin kerroksiin perinteisesti sekoitussäiliön. Tuloksista nähtiin, että hartsin syöttö perälaatikon lähestymisvirtaukseen on mahdollista kartongin laadun ja liimausasteen siitä karsimatta. Liimausaste määritettiin Stora Enson spesifisen REP-menetelmän (raw edge penetration) avulla. Koesarjojen välille ei syntynyt merkittäviä eroja reunaimeytymätasoihin, eikä koesarjojen sisäisiin vaihteluihin verrattaessa referensikonerulliin.

Tuotannonsuunnittelu- ja -ohjausprosessin kehittäminen konepajayrityksessä

Tehdyssä kirjallisuus- ja teoriakatsauksessa vuosien 2006 - 2010 välisenä aikana, Keski-Suomessa toimivan konepajateollisuuden järjestelmätoimittajayrityksen toimeksiannosta, pyrittiin muodostamaan kokonaiskuva laajasta tuotannonsuunnittelun ja -ohjauksen aihealueesta. Perustutkimuskysymykset liittyivät ns. MPC-systeemiin, jolla tarkoitetaan sitä, että tuotannonsuunnittelu- ja ohjauskysymyksissä on huomioitava aina henkilöiden, organisaation, teknologioiden ja prosessien muodostama kokonaisuus. Operatiivisen johtamisen tehtävänä on yrityksen tuotteita koskevan kysynnän ja tarjonnan tasapainottaminen niin, että resursseja käytettäisiin ja tarvittaisiin mahdollisimman vähän vastattaessa kysyntään asiakasvaatimukset huomioiden. Tuotantostrategian pohjalta on voitava rakentaa MPC-systeemi, jonka avulla ja jota kehittäen tuotanto saavuttaisi sille asetetut suorituskykytavoitteet mm. kustannusten, laadun, nopeuden, luotettavuuden sekä tuottavuuskehityksen osalta. Työssä tarkasteltiin yleisen kolmitasoisen viitekehyksen kautta ”perinteisistä MPC-systeemien perusratkaisuista” hierarkkisia, suunnittelu- ja laskentaintensiiviä, MRP-pohjaisia sekä yksinkertaistamiseen ja nopeuteen perustuvia JIT/Lean -menetelmiä. Tämä viitekehys käsittää: 1) kysynnän- ja resurssien hallinnan, 2) yksityiskohtaisemman kapasiteetin ja materiaalien hallinnan sekä 3) tarkemman tuotannon ja hankintojen ohjauksen sekä tuotannon lattiatason osa-alueet. Johtamisen ja MPC-systeemien kehittämisen ”uusina aaltoina ja näkökulmina” raportissa käsiteltiin myös johtamisen eri koulukuntia sekä em. viitekehyksen pohjalta tarvittavia tietojärjestelmiä. Olennaisimpana johtopäätöksenä todettiin, että MRP-pohjaisten ratkaisujen lisäksi, etenkin monimutkaisia tuotteita tilausohjautuvasti valmistavien kappaletavarateollisuuden yritysten, on mahdollisesti hyödynnettävä myös kehittyneempiä suunnittelu- ja ohjausjärjestelmiä. Lisäksi huomattiin, että ”perinteisten strategioiden” rinnalle yritysten on nostettava myös tieto- ja viestintäteknologiastrategiat. On tärkeää ymmärtää, että täydellistä MPC-systeemiä ei ole vielä keksitty: jokaisen yrityksen tehtäväksi ja vastuulle jää ”oman totuutensa” muodostaminen ja systeeminsä rakentaminen sen pohjalta.

BimTwin - Two component continuous process hygiene concept

The aim of this study was to examine suitability of BimTwin cleaning concept in card board machine to control microbiological activity and describe microbiological balance of the machine. In a review of literature is examined microbe and spore caused problems in paper industry. Biggest problems are deposits, which decrease runnability and cause quality errors. In this chapter is also introduced most common oxidizing biocides used in paper industry and described ATP assay as a microbiological monitoring method. In an experimental part are included BimTwin mill trial results, chemical condition monitoring methods and microbiological balance in a card board machine. In a second part are examined possibilities to effect hygiene of card board by chemical treatment of the surface size and coating. Result showed that BimTwin concept is suitable for card board machine as a cleaning concept, when chemical dosing is fitted right. For proper dosing and secure tolerable hygiene level, chemical and microbiological monitoring is significant. Determining of the microbiological balance would have need more sampling. According to acquired results, broke turned out to be the biggest microbe source. Sizing and coating experiments showed that it is possible to improve hygiene of card board by chemically treated surface size and coating color.

Metaanin muodostumisen mallintaminen kaatopaikalla

Methane-rich landfill gas is generated when biodegradable organic wastes disposed of in landfills decompose under anaerobic conditions. Methane is a significant greenhouse gas, and landfills are its major source in Finland. Methane production in landfill depends on many factors such as the composition of waste and landfill conditions, and it can vary a lot temporally and spatially. Methane generation from waste can be estimated with various models. In this thesis three spreadsheet applications, a reaction equation and a triangular model for estimating the gas generation were introduced. The spreadsheet models introduced are IPCC Waste Model (2006), Metaanilaskentamalli by Jouko Petäjä of Finnish Environment Institute and LandGEM (3.02) of U.S. Environmental Protection Agency. All these are based on the first order decay (FOD) method. Gas recovery methods and gas emission measurements were also examined. Vertical wells and horizontal trenches are the most commonly used gas collection systems. Emission measurements chamber method, tracer method, soil core and isotope measurements, micrometeorological mass-balance and eddy covariance methods and gas measuring FID-technology were discussed. Methane production at Ämmässuo landfill of HSY Helsinki Region Environmental Services Authority was estimated with methane generation models and the results were compared with the volumes of collected gas. All spreadsheet models underestimated the methane generation at some point. LandGEM with default parameters and Metaanilaskentamalli with modified parameters corresponded best with the gas recovery numbers. Reason for the differences between evaluated and collected volumes could be e.g. that the parameter values of the degradable organic carbon (DOC) and the fraction of decomposable degradable organic carbon (DOCf) do not represent the real values well enough. Notable uncertainty is associated with the modelling results and model parameters. However, no simple explanation for the discovered differences can be given within this thesis.

Tiedon hallinta varastonhallintajärjestelmän hankinnassa

Diplomityössä toteutettiin varastonhallintajärjestelmän hankinta prosessoimalla tietoa hallitusti varastonhallinnan kehittämiseksi. Kvalitatiivinen tapaustutkimus tehtiin tietojohtamisen näkökulmasta käyttäjälähtöisen C-CEI –menetelmän avulla haastattelemalla ja havainnoimalla tapausyritystä. Haastatteluja tehtiin 10 kertaa. Tutkimuksessa kartoitettiin ja kilpailutettiin kotimaiset järjestelmätoimittajat, joita löydettiin 15. Näistä toimittajista 6 vastasi vaatimuksia ja teki tarjouksen. Tutkimuksen lopuksi tehtiin järjestelmän hankintaehdotus. Tutkimuksen teoreettinen viitekehys koostui tietojohtamisesta, varastonhallinnasta ja ohjelmistotuotannosta. Tutkimuksessa pääkysymyksenä esitettiin miten tietojohtamisen avulla voidaan tukea varastonhallintajärjestelmän hankintaa. Tutkimuksessa havaittiin, että tietojärjestelmän hankinta varastonhallinnan osalta on moniulotteinen liiketoiminnan kehittämistehtävä. Tietojärjestelmähankinta tulisi siten nähdä liiketoimintaa eteenpäin vievänä mahdollisuutena. Lisäksi loppukäyttäjän vaatimusten kartoittamiseen tulisi sitoutua huolella ja suhtautua kriittisesti eri järjestelmävaihtoehtoihin. Vaatimusmäärittelyn asettaminen ja vaatimusten priorisoiminen ovat haasteellisia tehtäviä. Tiedon hallinnan aikana saatiin selville, että loppukäyttäjän vaatimusten mukainen tarjouspyyntö edesauttaa ensinnäkin tarjousten tekemistä mutta myös niiden prosessointia ja analysointia. Vain oikealla tiedolla ja sen yhteyksillä on merkitystä. Tutkimuksen perusteella tietojärjestelmän hankinta suositellaan tehtäväksi hallitsemalla tietoa systemaattisesti erityisesti sen alkuvaiheen aikana. Tietojohtaminen virtaviivaistaa hankkeen etenemistä ja aikataulutusta, vähentää loppukäyttäjän kustannuksia tehokkaalla kilpailutusmenettelyllä, edistää kilpailukykyä ja luo hyvän lähtökohdan koko tietojärjestelmän hankinnan läpiviemiselle ja yhteistyö-suhteen rakentumiselle kauppakumppaneiden välille.

Experimental evaluation of the performance of a wireless sensor network in agricultural environments

The aim of this study was to perform an experimental study to evaluate the proper operation distance between the nodes of a wireless sensor network available on the market for different agricultural crops (maize, physic nut, eucalyptus). The experimental data of the network performance offers to farmers and researchers information that might be useful to the sizing and project of the wireless sensor networks in similar situations to those studied. The evaluation showed that the separation of the nodes depends on the type of culture and it is a critical factor to ensure the feasibility of using WSN. In the configuration used, sending packets every 2 seconds, the battery life was about four days. Therefore, the autonomy may be increased with a longer interval of time between sending packets.

Maastotyökoneen ajomoottorin hybridisointiin soveltuvan napavaihteiston dynamiikan mallinnus.

Työn tavoitteena oli mallintaa maastotyökoneen ajomoottorin hybridisointiin soveltuvan napavaihteiston dynamiikka. Työ tehtiin osana Saimaan ammattikorkeakoulun tutkimusprojektia, jonka tarkoituksena oli ajomoottorin ja integroidun napavaihteiston kaupallistaminen maastotyökoneisiin. Maastotyökoneena simulointimallissa käytettiin tyypillistä maataloustraktoria, johon kytkettiin vielä peräkärry. Traktorin renkaiden napaan oli kytketty ajomoottorina toimiva sähkömoottori, jonka sisään simuloitu napavaihteisto oli integroitu. Napavaihteiston dynamiikan mallintamiseen käytettiin monikappaledynamiikan simulointiohjelmistoa (Adams). Ohjelmalle määritettiin napavaihteiston komponenttien parametrit, joista voitiin simuloida vaihteiston dynaaminen käyttäytyminen. Simuloidusta mallista saatiin kytkimiin kohdistuvat voimat kytkentätilanteessa sekä sähkömoottorin väännön suunnanvaihtotilanteessa eri akselin pituuksilla, eri kytkinten nopeuseroilla, eri traktorin painoilla ja eri kuormilla ajettaessa. Mallissa simuloitiin myös sähkömoottorin käyttäytyminen vaihteenvaihtotilanteessa eri pyörimisnopeuden säätimen kertoimilla. Työssä huomattiin, että akselin mitoituksella voitiin vaikuttaa vaihteistossa ilmeneviin voimiin kytkimen kytkentähetkellä. Myös kytkimen hammastuksessa olevalla hammasvälyksellä voitiin vaikuttaa kytkimiin kohdistuviin voimiin suunnanvaihtotilanteissa. Vaihteistoon kohdistuvista voimista voidaan jatkossa suunnitella kytkimen ja akselin profiili, jotta vaihteisto kestää siihen kohdistuvat voimat.

A physical activity intervention in a workplace setting

Physical inactivity poses a huge burden on Canada's health care system and is detrimental to the health of Canadians (Katzmarzyk & Janssen, 2004). Walking is a viable option for individuals to become physically active on a daily basis and is in fact the most commonly reported leisure time physical activity. It has been associated with many health benefits including weight loss/weight control, reduced risk of coronary artery disease and diabetes, lowered blood pressure, and improved psychological wellbeing (Brisson & Tudor-Locke, 2004). Specifically, individuals' stage of change, selfefficacy and health related quality of life (HRQL) are three psychological constructs that can be greatly improved with increased physical activity (Dishman, 1991; Penedo & Dahn, 2005; Poag & McAuley, 1992). Public health physical activity recommendations exist but many individuals find these difficult to meet due to overly busy lifestyles (Public Health Agency of Canada, 2003). Pedometers are inexpensive devices that can monitor individual bouts of walking so that the incorporation of physical activity into one's daily life is more plausible. They are also excellent tools for motivation, goalsetting, and immediate feedback (Brisson & Tudor-Locke, 2004). Since many people spend a large proportion of their time at their places of employment, workplaces have begun to be a common site for the development of physical activity interventions. These programs have been growing in popUlarity and have shown numerous benefits for both employees and employers (Voit, 2001). The purpose of the current study was to implement and evaluate the use of a pedometer-based physical activity intervention incorporating goal-setting and physical activity logs in a workplace setting, and to examine the relationship between different types of self-efficacy (task, barrier, and scheduling) and different phases of the intervention. Twenty male participants from a local steel manufacturing plant who exhibited health risk factors (e.g. hypertension, diabetes, etc.) were assigned to one of two groups (group A or group B). All participants were asked to wear pedometers on their waists, record their daily steps, set goals that were outlined on a step-tracking sheet (detennined by their baseline number of steps), and keep track of their work days, wakelbed time, sedentary time, and time spent doing other physical activity. Group A began the intervention immediately following the baseline measures, whereas group B continued with their regular routine for 4 weeks before beginning. Physiological measures (height, weight, blood pressure, relative body fat, waist and hip circumference, and body mass index) were taken and a battery of questionnaires that assessed barrier, task and scheduling self-efficacy, HRQL, and stage of change administered at baseline, week 5 (end of intervention for group A), week 9 (end of intervention for group B; follow-up for group A) and week 13 (follow-up for both groups). Results showed that this workplace physical activity intervention was successful at increasing the participants' daily steps, that task self-efficacy is a significant predictor of participants' exercise adherence during the initial stages of participation (intervention phase), and that the participants felt that this intervention was effective. Finally, further exploratory analyses showed that this intervention was effective for all participants, but most valuable for participants most in need of improvement - that is, those who were most sedentary prior to the intervention. This intervention is an inexpensive use of simple and effective tools (e.g. pedometers), has the potential to attract a wide variety of participants and become a pennanent part of any health promotion initiative.

Teaching media literacy skills about commercials: a comparative analysis of media literacy instruction /

In this study, methods of media literacy instruction including analytic activities, production activities, and a combination of analytic and production activities were compared to determine their influence on grade 8 students' knowledge, attitudes, and behaviours towards commercials. The findings showed that media literacy instruction does improve media literacy skills. Specifically, activities that included an analytic component or an analytic and production component were significantly better than activities that included a production component. Participants that completed analytic or analytic and production activities were able to discern media-related terms, target audience, selling techniques, social values, and stereotypes in commercials better than participants that completed only production activities. The research findings also showed obstacles when teaching media literacy. When engaged in analytic activities, the difficulties included locating suitable resources, addressing the competition from commercials, encouraging written reflection, recognizing social values, and discussing racial stereotypes. When engaged in production activities, the difficulties were positioning recording stations, managing group work, organizing ideas, filming the footage, computer issues, and scheduling time. Strategies to overcome these obstacles are described.

Evolution of architectural floor plans

Layout planning is a process of sizing and placing rooms (e.g. in a house) while a t t empt ing to optimize various criteria. Often the r e are conflicting c r i t e r i a such as construction cost, minimizing the distance between r e l a t ed activities, and meeting the area requirements for these activities. The process of layout planning ha s mostly been done by hand, wi th a handful of a t t empt s to automa t e the process. Thi s thesis explores some of these pa s t a t t empt s and describes several new techniques for automa t ing the layout planning process using evolutionary computation. These techniques a r e inspired by the existing methods, while adding some of the i r own innovations. Additional experimenLs are done to t e s t the possibility of allowing polygonal exteriors wi th rectilinear interior walls. Several multi-objective approaches are used to evaluate and compare fitness. The evolutionary r epr e s ent a t ion and requirements specification used provide great flexibility in problem scope and depth and is worthy of considering in future layout and design a t t empt s . The system outlined in thi s thesis is capable of evolving a variety of floor plans conforming to functional and geometric specifications. Many of the resulting plans look reasonable even when compared to a professional floor plan. Additionally polygonal and multi-floor buildings were also generated.

Second Welland Canal - Book 3, Survey Map 9 - Canal along Chippewa Creek in Thorold

Survey map of the Second Welland Canal created by the Welland Canal Company showing the canal in the Thorold Township between Port Robinson and Welland. Identified structures and features associated with the Canal include the towing path, back ditches, and the waterway itself. The surveyors' measurements and notes can be seen in red and black ink and pencil. Local area landmarks are also identified and include several road allowances, two bridges(Northern most bridge would be the Quaker Bridge), Spoil Bank, two ponds, and several fences. Properties and property owners of note are: Lot 229, and Jacob Silverthorne.

Second Welland Canal - Book 3, Survey Map 10 - Canal along Chippewa Creek in Thorold

Survey map of the Second Welland Canal created by the Welland Canal Company showing the canal in the Thorold Township between Port Robinson and Welland. Identified structures and features associated with the Canal include the towing path, a ditch, foot of the slope of bank, and the waterway itself. The surveyors' measurements and notes can be seen in red and black ink and pencil. Local area landmarks are also identified and include roads (ex. Road to Wellandville), a bridge, a marsh, Spoil Bank, and a fence running along the canal. Properties and property owners of note are: Lot 238, Broken Lot 238, and J. Burger.

Grant of Permission for lease of military lands from Sir Robert Prescott to Thomas Clark, 1798-1801.

Transcript (original spelling and grammar retained): By His Excellency Robert Prescott Esquire, Captain General and Governor in Chief in and over His Majestys Provinces of Upper and Lower Canada, General and Commander in Chief of all His Majesty’s forces in the Provinces of Upper and Lower Canada, Nova Scotia, New Brunswick and their several Dependencies and in the Island of Newfoundland &ca. &ca. &ca. I do hereby authorise and permit Thomas Clark of Queenstown in the County of Lincoln in the Province of Upper Canada merchant to take possession of all that Lot, piece and parcel of Land (being part of the land reserved by his Majesty for Military purposes) situate, lying and being at Queenstown in the Township of Newark, in the Home District in the said Province of Upper Canada, bounded and abutted as follows, that is to say beginning at the Distance of two Chains and ninety links from the South East End of his Majesty’s Store House, the said distance being measured along the Bank up Stream, thence South thirty nine degrees and an half West one Chain and fifty links thence south fifty degrees and an half East one Chain and thirty links thence North thirty nine degrees and an half East to the Edge of the Bank and from thence along the Bank to the place of beginning, containing thirty one perches and one hundred and twenty five square links and to occupy and hold the said Lot, piece and parcel of Land during pleasure subject nevertheless to the provisoes and Conditions herein after contained, that is to say. First on condition that it shall and may be lawful to and for His Majesty his Heirs and Successors and to and for the Commander in Chief of His Majesty Forces for the time being and to and for the Officer commanding his Majesty’s Forces in Upper Canada for the time being and to and for either of them to determine and make void this present permission to occupy during pleasure the said Lot, Piece or Parcel of Land above described at any time hereafter whenever he or they shall see fit so to do without any compensation or indemnification to the said Thomas Clark or any other Person or Persons whosoever for any Loss Injury or Damage which he the said Thomas Clark or any other Person or Persons whosoever may thereby sustain. Secondly on this further Condition that it shall and may be lawful to and for His Majesty his Heirs and Successors and to and for his and their Officers, Soldiers and Servants at any time hereafter by order of the Commander in Chief of His Majesty’s Forces for the time being or by order of the Officer commanding his Majesty’s forces in Upper Canada for the time being or by order of the Officer of His Majesty’s Corps of Royal Engineers commanding in the said Province of Upper Canada for the time being to enter upon the said Lot Piece and parcel of Land which the said Thomas Clark is hereby permitted to occupy during pleasure or upon any part thereof and to take down and from the said Lot piece and parcel of Land or from any part thereof to remove any dwelling House Store or other Buildings on the said Lot, piece or Parcel of Land or any part thereof erected and to remove any goods or Chattels on the said Lot piece and parcel of Land or on any part thereof or on any such dwelling House Store or other building found or being and that His Majesty his Heirs and Successors or any other Person or Persons whosoever shall not be liable or responsible to the said Thomas Clark or to any other Person or Persons whosoever for any Loss, Injury or Damage which he or they shall or may in such case sustain. Thirdly on this further Condition that the said Thomas Clark shall not erect on the said Lot Piece or Parcel of Land which the said Thomas Clark is hereby permitted to occupy during pleasure or upon any part thereof at any time or times hereafter any dwelling House store or other Building whatsoever of Stone or brick or of any other materials wood only exccepted and that if any dwelling House or Store or other building of Stone or brick or of any other materials except wood shall at any time be erected on the said Lot, piece or parcel of Land or upon any part thereof, then and in such case, this present permission and every Clause and Article thereof shall from thenceforth cease and determine and be absolutely and entirely null and void. And lastly on this further Condition that the said Thomas Clark or any other Person whosoever shall not assign this permission to occupy the said Lot, Piece or Parcel of Land above described to any Person of Persons whosoever, and if any such assignment shall be made by the said Thomas Clark or by any other Person in his right, or on his behalf, that then and in such case such assignment and this permission to occupy during pleasure the said Lot piece and parcel of Land above described, and every Clause and Article thereof shall from thenceforth cease and determine and be absolutely and entirely null and void. Given under my hand at the Castle of St. Lewis in the City of Quebec in the Province of Lower Canada this Ninth day of July in the year of our Lord one thousand seven hundred and ninety eight and in the thirty eighth year of His Majesty’s Reign. [Signed here by Robert Prescott] By Order of the Commander in Chief [Signed here by James Green (Illegible signature)] I the said Thomas Clark above named do hereby accept the above written Permission to occupy during pleasure the said Lot piece and parcel of Land above described upon and subject to the several Provisioes and Conditions above written and each and every of them severally and respectively. In witness whereof I have hereunto set my hand the Sixteenth day of August in the year of our Lord one thousand seven hundred and ninety eight and in the thirty eighth year of His Majesty’s Reign. [Signed here by Thomas Clark] Signed in the presence of [Illegible signature – looks like J. M Donell Lt. Col.] [Illegible – looks like 2d. Battn R. C. Sm?] [Signed here by C. Anderson] Whereas Inconveniences did arise from the peculiar situation of the Ground contiguous to the above described Lot of Land and the occupation thereof, if estimated by the above Limits would prove highly disadvantageous to Mr. Thomas Clark be it known that in consideration thereof we do permit the above Lot to extend one half Chain more in length up stream so as to comprehend the space allowed for the Road between Lots Two + Three, and we do hereby appropriate the said additional space wholly to the use of the said Thomas Clark. In witness whereof we have hereunto subscribed this Thirteenth Day of October in the Year of our Lord one thousand Eight Hundred and one. [Signed here by J. M’Donell Lt. Col] 2d. Battn. R. C. [in?] Com of Fort George + Dependencies Robt. Pilkington Captain Royal Engineers

Wine for Sale at Garraway's Coffee-House in Cornhill

A list of wines for sale "by the candle at Garraway's Coffee-house in Exchange Alley, Cornhill..." six pages in length. The list begins with four conditions of sale and then lists types of wines, lot numbers and how many dozen are available. The wines available are: Excellent Old Hock, Old Hock, Rich Hungarian White Wine, Hungarian White Wine, Curious French Claret, White Perfian Wine, and Curious Rich Perfian Red Wine. The broker listed on the final page is Peter Fearon.

Réduction du ruissellement par l’augmentation de surfaces perméables : évaluation de 2 scénarios d’aménagement d’un ensemble résidentiel à Laval

L’implantation répandue de nouveaux quartiers résidentiels sur le territoire de la périphérie urbaine est en partie responsable de la baisse du couvert végétal et de l’augmentation des surfaces imperméables à grande échelle. Les villes sont maintenant aux prises avec une augmentation constante de la production de ruissellement qu'elles doivent gérer au moyen d’un vaste réseau d’égouts et de canalisations. Des données sur les impacts de ces modèles de quartier résidentiel nous révèlent que cette forme d’habitat provoque la dégradation des milieux naturels et aquatiques. La présente étude vise à mettre à l’épreuve la stratégie d’aménagement de l’Open space design en comparant l’effet de trois situations d’aménagement d’ensembles résidentiels sur le coefficient de ruissellement pondéré (Cp). Les trois situations étudiées sont 1 : le développement actuel tel que conçu par le promoteur, 2 : un scénario de quartier visant la préservation des cours d’eau existants ainsi qu’une réduction des lots et des surfaces imperméables et 3 : un quartier avec des types d’habitation plus denses. Les coefficients pondérés obtenus sont respectivement de 0,50 pour le quartier actuel, de 0,40 pour le scénario 1 et de 0,34 pour le scénario 2. Au terme de cet exercice, il apparaît, d’une part, que la densification du bâti, la nature des surfaces et l’organisation spatiale peuvent concourir à diminuer la production de ruissellement d’un quartier. Cette étude permet de situer l’importance de la gestion du ruissellement dans la planification et l’aménagement du territoire.