Greenroof Study: Final Report An Assessment of Greenroof Design and Maintenance in Portland, Oregon: 2011 – 2013

Mapping Intimacies ◽

10.15760/mem.55 ◽

2016 ◽

Author(s):

◽

Windy Beck ◽

Keyword(s):

Data Collection ◽

Stormwater Management ◽

Private Property ◽

Final Report ◽

Sewer System ◽

The City ◽

Term Maintenance ◽

Storm Sewer

In 1999 the City of Portland (City) began to require that stormwater management facilities (SMF) be built when private property is newly developed or redeveloped (City Code Chapter 17.38). Proper maintenance and upkeep of SMFs is essential to ensuring they function appropriately. The City’s Maintenance Inspection Program (MIP) is tasked with inspecting stormwater management facilities on private properties in order to ensure that they are being properly operated and maintained and to meet provisions of the City’s NPDES Municipal Separated Storm Sewer System (MS4) permit. Greenroofs are one type of SMF that are installed to satisfy this requirement. Understanding the long-term maintenance needs of a greenroof is essential to reaching MIP goals established by City Code and the MS4 permit. Data collection occurred between November 2011 and May 2013 at private properties in Portland, Oregon during routine maintenance inspections of stormwater management facilities for the City’s Maintenance Inspection Program (MIP).

Download Full-text

The Cultural Sequence at Yarinacocha, Eastern Peru

American Antiquity ◽

10.2307/276487 ◽

1958 ◽

Vol 23 (4) ◽

pp. 379-388 ◽

Cited By ~ 12

Author(s):

Donald W. Lathrap

Keyword(s):

Natural History ◽

Field Work ◽

Final Report ◽

American Museum ◽

June July ◽

The City

During May, June, July, and August of 1956 I was engaged in archaeological field work near the city of Pucallpa on the Ucayali River in eastern Peru. The project was sponsored by the American Museum of Natural History as a part of its long term program of anthropological work in the Peruvian Montana. The Museum grants permission to present this preliminary statement, and it will publish the final report on this work.

Download Full-text

Synergistic benefits between stormwater management measures and a new pricing system for stormwater in the City of Hamburg

Water Science & Technology ◽

10.2166/wst.2017.337 ◽

2017 ◽

Vol 76 (6) ◽

pp. 1523-1534 ◽

Cited By ~ 1

Author(s):

N. P. Bertram ◽

A. Waldhoff ◽

G. Bischoff ◽

J. Ziegler ◽

F. Meinzinger ◽

...

Keyword(s):

Stormwater Management ◽

Management Practice ◽

Geographical Information ◽

Sewer System ◽

Digital Database ◽

Management Measures ◽

Independent Analysis ◽

Wastewater Infrastructure ◽

Potential Risks ◽

The City

Hamburg is a growing metropolitan city. The increase in sealed surfaces of about 0.36% per year and the subsequent increased runoff impacts on the city's wastewater infrastructure. Further potential risks to the drainage infrastructure arise also from effects of climate change, e.g. increased intensity and frequency of heavy rainfalls. These challenges were addressed in the Rain InfraStructure Adaption (RISA) project conducted 2009–2015 by HAMBURG WASSER and the State Ministry for Environment and Energy, supported by several municipal stakeholders. RISA addressed intensifying conflicts in the context of urban development and stormwater management at that time. Major results of the project are improvements and recommendations for adequate consideration of stormwater management issues during urban planning as well as new funding mechanisms for stormwater management measures. The latter topic resulted in the introduction of a separated stormwater charge based on the amount of sealed area connected to the sewer system of each property. For both undertakings – the RISA project and the introduction of the separated stormwater charge – a novel, comprehensive, digital database was built. Today, these geographical information system (GIS)-based data offer various scale-independent analysis and information opportunities, which facilitate the day-to-day business of HAMBURG WASSER and stormwater management practice in Hamburg.

Download Full-text

Using deterioration modelling to simulate sewer rehabilitation strategy with low data availability

Water Science & Technology ◽

10.2166/wst.2020.604 ◽

2020 ◽

Author(s):

N. Caradot ◽

Ph. R. Sampaio ◽

A. S. Guilbert ◽

H. Sonnenberg ◽

V. Parez ◽

...

Keyword(s):

Data Availability ◽

Sewer System ◽

Industry Standard ◽

Lack Of Information ◽

Sewer Rehabilitation ◽

Rehabilitation Model ◽

Aging Infrastructure ◽

The City ◽

Source Of Information

Abstract Most cities face the problem of an aging infrastructure in need of extensive and ongoing repair, renovation or replacement. Since the 1980's, CCTV is the industry standard for sewer system inspection and the main source of information for structural performance evaluation. Due to low inspection rates and the lack of information about sewer condition, deterioration models have been developed to simulate the condition of non-inspected sewers and assess the influence of several rehabilitation scenarios. This paper presents an innovative modelling tool for long-term sewer rehabilitation planning based on the integration of a deterioration and a rehabilitation model. The tool is demonstrated in full scale using CCTV and sewer data of the city of Sofia, in Bulgaria. Results provide tangible proofs of investments needs for sewer rehabilitation and support the utility in the negotiation of budgets with the municipality. Since age is a one of key variable for deterioration modelling, a new method is proposed to estimate missing construction years in the utility database with a prediction error of less than 7 years.

Download Full-text

Stress in the city: meta-analysis indicates no overall evidence for stress in urban vertebrates

Proceedings of The Royal Society B Biological Sciences ◽

10.1098/rspb.2020.1754 ◽

2020 ◽

Vol 287 (1936) ◽

pp. 20201754

Author(s):

Maider Iglesias-Carrasco ◽

Upama Aich ◽

Michael D. Jennions ◽

Megan L. Head

Keyword(s):

Data Collection ◽

Urban Areas ◽

Detrimental Effect ◽

Meta Analysis ◽

Life Stage ◽

Urban Environments ◽

Effect Sizes ◽

Wild Animals ◽

The City

As cities continue to grow it is increasingly important to understand the long-term responses of wildlife to urban environments. There have been increased efforts to determine whether urbanization imposes chronic stress on wild animals, but empirical evidence is mixed. Here, we conduct a meta-analysis to test whether there is, on average, a detrimental effect of urbanization based on baseline and stress-induced glucocorticoid levels of wild vertebrates. We found no effect of urbanization on glucocorticoid levels, and none of sex, season, life stage, taxon, size of the city nor methodology accounted for variation in the observed effect sizes. At face value, our results suggest that urban areas are no more stressful for wildlife than rural or non-urban areas, but we offer a few reasons why this conclusion could be premature. We propose that refining methods of data collection will improve our understanding of how urbanization affects the health and survival of wildlife.

Download Full-text

Evaluation of sewer infiltration/inflow using COD mass flux method: case study in Prague

Water Science & Technology ◽

10.2166/wst.2012.229 ◽

2012 ◽

Vol 66 (3) ◽

pp. 673-680 ◽

Cited By ~ 8

Author(s):

V. Bareš ◽

D. Stránský ◽

P. Sýkora

Keyword(s):

Oxygen Demand ◽

Absorption Spectrometry ◽

Water Quality Monitoring ◽

Relevant Information ◽

Data Series ◽

Sewer System ◽

Statistical Relevance ◽

The City

The combined sewer system of the City of Prague, similar to other relevant locations, is strongly affected by infiltrating waters. The knowledge of their volume is one of the important parameters with respect to sewer system operation, maintenance and reconstruction. The methodology is based on the variation of diurnal chemical oxygen demand (COD) load and continuous water quality monitoring using in-line absorption spectrometry. This approach allows the identification of individual components of the diurnal wastewater hydrograph, in particular the contribution of parasitic water flow to wastewater discharge. The statistical relevance was tested using Monte Carlo simulations on a 7-year data series of flow rate. The results show that application of this methodology provides specific relevant information about individual sub-catchments within an entire sewer system, particularly in terms of absolute and relative values of I/I and structural state indicators. Processing of long-term data series gives clear information about the significance of the monitoring period length for the relevance of obtained results.

Download Full-text