@inproceedings{LeutnantKleckersHaberkampetal.2018, author = {Leutnant, Dominik and Kleckers, Jonas and Haberkamp, Jens and Uhl, Mathias}, title = {In-situ-Monitoring der Reinigungsleistung großer dezentraler Niederschlagswasserbehandlungsanlagen}, series = {Regenwasser in urbanen R{\"a}umen - aqua urbanica trifft RegenwasserTage 2018}, booktitle = {Regenwasser in urbanen R{\"a}umen - aqua urbanica trifft RegenwasserTage 2018}, editor = {Schmitt, Theo G.}, publisher = {Technische Universit{\"a}t Kaiserslautern}, address = {Kaiserslautern}, organization = {Institut Wasser Infrastruktur Ressourcen}, isbn = {978-3-95974-086-9}, issn = {2570-1460}, pages = {191 -- 201}, year = {2018}, abstract = {Große dezentrale Niederschlagswasserbehandlungsanlagen werden mittels kontinuierlicher G{\"u}temesstechnik hinsichtlich ihrer Frachtwirkungsgrade an Standorten mit hohem Stoffaufkommen untersucht. Die Bilanzierung der Zulauf- und Ablauffrachten basiert auf dem Zusammenhang zwischen den abfiltrierbaren Stoffen (AFS) und der Tr{\"u}bung. Erste Ergebnisse der Installation der Messtechnik, des Datenmanagements und Frachtwirkungsgrade werden vorgestellt.}, language = {de} } @article{BergerDuewelMerkeletal.2018, author = {Berger, Viktoria and D{\"u}wel, Ulrike and Merkel, Wolf and Sch{\"u}ttrumpf, Holger and Uhl, Mathias}, title = {Wasserforschung in Nordrhein-Westfalen}, series = {KA Korrespondenz Abwasser, Abfall}, volume = {2018(65)}, journal = {KA Korrespondenz Abwasser, Abfall}, number = {10}, issn = {1866-0029}, pages = {923 -- 930}, year = {2018}, abstract = {Nordrhein-Westfalen braucht eine gut aufgestellte Wasserforschung, um den heutigen und k{\"u}nftigen Herausforderungen im Land sowie auch national und international gewachsen zu sein. Eine erste Erfassung der Wasserforschung in Nordrhein-Westfalen im Sommer 2017 vermittelte Fakten zu Bestand, Defiziten und Entwicklungspotenzialen. Mehr als 750 Wissenschaftler forschen in Nordrhein-Westfalen in {\"u}ber neunzig Forschungsgruppen verschiedener Disziplinen zum Thema Wasser. Die Schwerpunkte liegen prim{\"a}r in den Ingenieurwissenschaften, aber auch in den Natur-, Geo-, Sozial-, Wirtschafts- und Rechtswissenschaften. Universit{\"a}ten, Fachhochschulen, An-Institute sowie außeruniversit{\"a}re Forschungsinstitutionen tragen zur breit aufgestellten Wasserforschung bei, die unter anderem in sechs Forschungszentren und zahlreichen Kooperationsprojekten untereinander vernetzt ist. Der guten nationalen Vernetzung der Akteure stehen befriedigende internationale und stark ausbauf{\"a}hige europ{\"a}ische Kontakte gegen{\"u}ber. Die internationale Sichtbarkeit und Attraktivit{\"a}t der Wasserforschung in Nordrhein- Westfalen wird ihren Spitzenleistungen in einzelnen Bereichen nicht gerecht. Ein vertiefter Praxistransfer von Forschungsergebnissen offeriert der Wasserwirtschaft innovative, praxistaugliche L{\"o}sungen und zudem der Umweltwirtschaft interessantere Marktchancen. Besonders g{\"u}nstige Randbedingungen sind in den innovationsf{\"a}higen Kommunen und Wasserverb{\"a}nden des großen, dicht besiedelten und an Landschaftstypen reichen Bundeslandes Nordrhein-Westfalen zu sehen. Im n{\"a}chsten Schritt wird zu analysieren sein, wie die Potenziale der Wasserforschung in Nordrhein-Westfalen effizienter genutzt und ausgebaut werden k{\"o}nnen, um zur zukunftssicheren und nachhaltigen Ausrichtung der Wasserwirtschaft in Nordrhein-Westfalen, zu wissenschaftlicher Exzellenz und umweltwirtschaftlichem Erfolg des Landes beizutragen.}, language = {de} } @article{LeutnantDoeringUhl2019, author = {Leutnant, Dominik and D{\"o}ring, Anneke and Uhl, Mathias}, title = {swmmr - an R package to interface SWMM}, series = {Urban Water Journal}, volume = {16/2019}, journal = {Urban Water Journal}, number = {1}, doi = {10.1080/1573062X.2019.1611889}, pages = {68 -- 76}, year = {2019}, abstract = {The stormwater management model SWMM of the US EPA is widely used to analyse, design or optimise urban drainage systems. To perform advanced analysis and visualisations of model data this technical note introduces the R package swmmr. It contains functions to read and write SWMM files, initiate simulations from the R console and to convert SWMM model files to and from GIS data. Additionally, model data can be transformed to produce high quality visualisations. In accordance with SWMM's open source policy the package can be obtained through github.com or the Comprehensive R Archive Network (CRAN).}, language = {en} } @inproceedings{LeutnantKleckersHaberkampetal.2019, author = {Leutnant, Dominik and Kleckers, Jonas and Haberkamp, Jens and Uhl, Mathias}, title = {Assessing the Performance of Decentralised Stormwater Management Measures by means of Continuous Turbidity Measurement}, series = {Novatech 2019 - 10th international conference on Urban Water - Strategies and solutions for sustainable management}, booktitle = {Novatech 2019 - 10th international conference on Urban Water - Strategies and solutions for sustainable management}, pages = {130 -- 133}, year = {2019}, abstract = {The in-situ performance of large decentralised stormwater treatment systems is investigated by means of continuous turbidity measurements. Turbidity measurements are used as a surrogate to continuously estimate Total Suspended Solid (TSS) concentrations. TSS event loads are calculated at the inlet and outlet of two stormwater treatment systems, which both are installed at the outlet of catchments with high pollution potential. The event-specific performance is defined as ratio between TSS loads of inflow and outflow. Based on measurement data obtained, the overall TSS load retention efficiency is about 32 \%.}, language = {en} } @inproceedings{LeutnantUhl2019, author = {Leutnant, Dominik and Uhl, Mathias}, title = {In-situ Monitoring großer dezentraler Behandlungsanlagen f{\"u}r Niederschlagsabfl{\"u}sse}, series = {12. Rostocker Abwassertagung - Emissionsminderung von Punktquellen im l{\"a}ndlichen Raum / Jens Tr{\"a}nckner (Hrsg.)}, booktitle = {12. Rostocker Abwassertagung - Emissionsminderung von Punktquellen im l{\"a}ndlichen Raum / Jens Tr{\"a}nckner (Hrsg.)}, isbn = {978-3-86009-488-4}, pages = {79 -- 85}, year = {2019}, abstract = {Der Behandlung von Niederschlagsabfl{\"u}ssen aus Trennsystemen kommt zur Zielerreichung eines wirksamen Gew{\"a}sserschutzes eine wesentliche Rolle zu. Konventionelle, zentrale Anlagen behandeln den Abfluss vor der Einleitung in das Gew{\"a}sser. Zunehmend an Bedeutung gewonnen haben dezentrale Anlagen, die den Abfluss am Entstehungsort behandeln. Unterschiedlich belastete Oberfl{\"a}chenabfl{\"u}sse k{\"o}nnen somit den wasserrechtlichen Anforderungen entsprechend gezielt behandelt werden. Voraussetzung zur Anwendung ist der Nachweis der vergleichbaren Reinigungsleistung zu zentralen Anlagen. In-situ G{\"u}temessungen der Zu- und Ablauffrachten einer Behandlungsanlage erm{\"o}glichen eine datenbasierte Bewertung der Anlagenwirksamkeit.}, language = {de} } @article{LeutnantMuschallaUhl2018, author = {Leutnant, Dominik and Muschalla, Dirk and Uhl, Mathias}, title = {Statistical Distribution of TSS Event Loads from Small Urban Environments}, series = {Water}, journal = {Water}, doi = {10.3390/w10060769}, pages = {769 -- 10}, year = {2018}, abstract = {Results from a long-term stormwater quality monitoring program were used to derive total suspended solids (TSS) event load distributions at four small urban environments (flat roof, parking lot, residential catchment, high traffic street). Theoretical distribution functions were fitted to the empirical distribution functions obtained. Parameters of the theoretical distribution functions were optimized with respect to a likelihood function to get both optimized parameters and standard errors. Kolmogorov-Smirnov and Anderson-Darling test statistics were applied to assess the goodness-of-fit between empirical and theoretical distribution. The lognormal distribution function was found to be most expressive to approximate empirical TSS event load distributions at all sites. However, the goodness-of-fit of the statistical model strongly depends on the number of events available. Based on the results of a Monte-Carlo-based resampling strategy, around 40 events should be considered.}, language = {en} } @article{LeutnantMuschallaUhl2018, author = {Leutnant, Dominik and Muschalla, Dirk and Uhl, Mathias}, title = {Distribution-Based Calibration of a Stormwater Quality Model}, series = {Water}, volume = {2018}, journal = {Water}, doi = {10.3390/w10081027}, pages = {1027 -- 10}, year = {2018}, abstract = {Stormwater quality models are usually calibrated using observed pollutographs. As current models still rely on simplified model concepts for pollutant accumulation and wash-off, calibration results for continuous pollutant concentrations are highly uncertain. In this paper, we introduce an innovative calibration approach based on total suspended solids (TSS) event load distribution. The approach is applied on stormwater quality models for a flat roof and a parking lot for which reliable distributions are available. Exponential functions are employed for both TSS buildup and wash-off. Model parameters are calibrated by means of an evolutionary algorithm to minimize the distance between a parameterized lognormal distribution function and the cumulated distribution of simulated TSS event loads. Since TSS event load characteristics are probabilistically considered, the approach especially respects the stochasticity of TSS buildup and wash-off and, therefore, improves conventional stormwater quality calibration concepts. The results show that both experimental models were calibrated with high goodness-of-fit (Kolmogorov-Smirnov test statistic: 0.05). However, it is shown that events with high TSS event loads (>0.8 percentile) are generally underestimated. While this leads to a relative deviation of -28\% of total TSS loads for the parking lot, the error is compensated for the flat roof (+5\%). Calibrated model parameters generally tend to generate wash-off proportional to runoff, which is indicated by mass-volume curves. The approach itself is, in general, applicable and creates a new opportunity to calibrate stormwater quality models especially when calibration data is limited.}, language = {en} } @inproceedings{HoernschemeyerHenrichsUhl2019, author = {H{\"o}rnschemeyer, Birgitta and Henrichs, Malte and Uhl, Mathias}, title = {Ein SWMM-Baustein f{\"u}r die Berechnung der Evapotranspiration von urbaner Vegetation}, series = {Tagungsband Aqua Urbanica 2019}, booktitle = {Tagungsband Aqua Urbanica 2019}, editor = {Burkhardt, Michael and Graf, C.}, organization = {HSR Hochschule f{\"u}r Technik, Rapperswil, Schweiz}, doi = {10.5281/zenodo.3384207}, pages = {133 -- 140}, year = {2019}, abstract = {Im Rahmen einer nachhaltigen Stadtentwicklung wird der Vegetation die Funktion der Beschattung und Verdunstung zugesprochen. Der Stadthydrologie fehlte hierf{\"u}r bislang ein geeignetes Simulationsmodell. Der entwickelte Modellbaustein SWMM-UrbanEVA erlaubt die standortgerechte Simulation der Verdunstung von Vegetation im urbanen Raum. F{\"u}r Freifl{\"a}chen erfolgt die Prozessmodellierung des Energie- und Wasserhaushaltes des Systems Boden-Pflanze-Atmosph{\"a}re. Mit meteorologischen und vegetationskundlichen Kenndaten wird eine raum-zeitlich differenzierte Berechnung erm{\"o}glicht.}, language = {de} } @inproceedings{HenrichsSteinbrichLeistertetal.2019, author = {Henrichs, Malte and Steinbrich, Andreas and Leistert, Hannes and Scherer, Isabell and Sch{\"u}tz, Tobias and Weiler, Markus and Uhl, Mathias}, title = {Model Based Estimation of a Natural Water Balance as Reference for Planning in Urban Areas}, series = {New Trends in Urban Drainage Modelling. Proceedings of the 11th International Conference on Urban Drainage Modelling}, booktitle = {New Trends in Urban Drainage Modelling. Proceedings of the 11th International Conference on Urban Drainage Modelling}, editor = {Manina, Giorgio}, publisher = {Springer International Publishing}, isbn = {978-3-319-99866-4}, pages = {953 -- 957}, year = {2019}, abstract = {The water balance of urban areas differs considerably from the landscape water balance. Increased surface runoff, reduced groundwater recharge and evaporation change the hydrological regime, the morphology and ecology of water bodies close to the cities, the groundwater in the urban area and the urban climate. Today's urban drainage systems are designed to prevent, reduce, drain, seep away, evaporate or discharge precipitation into nearby surface waters with considerable delays. In doing so, it follows the principles of the German Water Resources Act (WHG) and the objectives of the relevant technical regulations DWA-A 102 to keep changes in the natural water balance by settlement activities as low as ecologically, technically and economically acceptable. A reference for the "natural" water balance has to be defined as a planning objective in order to quantify the hydrological changes in settlements. As a suitable reference, we propose to use the water balance of the landscape of the associated ecoregion with today's cultural land use without urban developments. This approach is more suitable to define local conditions than the water balance of the enclosed catchment. The presented calculation approach to define reference values of the water balance, uses soil and geological properties, precipitation and climate data and can be implemented and applied uniformly throughout Germany. The water balances in this study are simulated with the water balance model RoGeR. In this study, the developed approach is applied for five locations in Germany.}, language = {en} }