Comparison of irrigation efficiency and plant health of overhead, drip, and sub-irrigation for extensive green roofs

Rowe, D. Bradley; Kolp, Matthew; Greer, Sarah E.; Getter, Kristin L.

doi:10.1016/j.ecoleng.2013.12.052

Cited by 37 publications

(31 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, perhaps partly because of its more parsimonious water use S. album was more drought tolerant than S. kamtschaticum. Rowe et al (2014) found similar results with syn. S. kamtschaticum var.…”

Section: Water Loss Adapterssupporting

confidence: 93%

“…Unfortunately, few published studies have evaluated irrigation system design in a green roof context. In one of the few, Rowe et al (2014) compared the performance of overhead, drip, and sub-irrigation systems. They found that the overhead system resulted in the highest substrate water content and wasted the least amount of water in the form of runoff.…”

Section: Irrigationmentioning

confidence: 99%

See 1 more Smart Citation

Water Through Green Roofs

Lambrinos

2015

Ecological Studies

View full text Add to dashboard Cite

How green roofs process water is a critical component of their function and effective management. As green roof technology has spread from northern Europe's relatively cool and humid climate, green roof designs have had to adapt to regional variations in the timing and availability of water. The development of regionally appropriate designs requires a mechanistic understanding of green roof water relations, plant eco-physiology and irrigation technology. Emerging designs effectively match environmental conditions, substrate characteristics, plant physiological traits, plant community interactions, and expert systems for applying supplemental water.Keywords Evapotranspiration · Hydrology · Irrigation · Plant selection · Plant water use strategies · Xeric climates Green Roofs as Hydrological SystemsThe vast majority of the water that lands on a conventional roof quickly flows off. In sharp contrast, water that lands on a green roof enters a complex hydrological system (Fig. 4.1). Stocks of water are held on and within plants, in substrate, and in various layered materials such as drainage and water retention fabrics. Water exits the system through evaporation from the substrate and plant surfaces, transpiration, and runoff. The magnitude of the various stocks of water as well as the flux of water between stocks and out of the system is governed by complex interactions among green roof components and the physical environment. This complexity makes green roof performance inherently dynamic and contingent on the details of system design and local conditions (Berndtsson 2010).Nevertheless, most extensive green roofs share broadly similar hydrological characteristics. The bulk of the standing stock of water on a green roof is held in the substrate. The amount of water intercepted and held by vegetation is comparatively

show abstract

Section: Water Loss Adapterssupporting

confidence: 93%

Section: Irrigationmentioning

confidence: 99%

Water Through Green Roofs

Lambrinos

2015

Ecological Studies

View full text Add to dashboard Cite

show abstract

“…This study presents the physical properties of the interparticle void spaces and the intraparticle pores found within common soilless granular materials and assesses their influence on the bulk hydraulic properties of the green roof systems as suspended vadose zone environments. The distribution of water within the green roof profile has implications both for stormwater capture (Carter and Jackson, 2007; Hilten et al, 2008; Qin et al, 2012; Uhl and Schiedt, 2008) and for the healthy growth of the plants (Breuning, 2013; MacIvor et al, 2013; Rowe et al, 2014). Green roof plantings are essential in maintaining stakeholder engagement with the system (McGlade and Hill, 2014) and in preventing wind scour and associated media loss (Hill et al, 2015).…”

mentioning

confidence: 99%

The Effect of Intraparticle Porosity and Interparticle Voids on the Hydraulic Properties of Soilless Media

Hill

Sleep

Drake

et al. 2019

Vadose Zone Journal

View full text Add to dashboard Cite

Core Ideas Green roofs comprise a soilless medium over an atmospheric equilibrated space. Green roofs represent microcosms of capillary fringe and vadose zone hydraulics. Bulk properties come from the interparticle voids and the intraparticle pores. Capillary retention is fundamental for water storage in a green roof system. Design specifications for green roofs should focus on using a well‐graded medium. An essential component of a building‐integrated vegetation system, such as an extensive green roof, is the layer of lightweight planting medium that supports rooting and stores water. Predicting and describing the stormwater management performance of green roofs requires reliable data regarding the water retention properties of the planting medium. Ten materials proposed for use on green roofs, including four mineral components, three biological components, and three commercial blends, were characterized through measurement of their water release curves (WRCs). In combination with the particle size distributions, the resultant data demonstrate that some of the materials contain measurable intraparticle pore networks in addition to the interparticle void spaces described in classical soil hydrology. The WRCs were also used to model the maximum water storage under static equilibrium conditions throughout a 15‐cm profile of each material. In freely draining, unsaturated green roof systems, the role of the intraparticle pores may be limited to increasing microscale roughness of particle surfaces, thereby reducing film flow under drier conditions. The highly organic, biologically derived materials—screened compost, bark fines, and shredded wood—demonstrated hydrophobicity when air dried, but wetting occurred within <30 min on all occasions, which would be within the time frame of many rainstorms. As with natural soils, the saturated hydraulic conductivity was lower in materials with a higher proportion of fines (<106 μm).

show abstract

“…Bu kapsamda her bir bitkinin boyutları 90 derecelik açıda iki yönlü en ölçümleri (genişlik) ile boy ölçümü ile tespit edilmiştir. Elde edilen bu değerlerin aritmetik ortalaması alınarak bitki büyüme endeksi (plant growth index) hesaplanmıştır [32,33] Genel iklim değişkenleri ile toprak nemi arasındaki ilişki incelendiğinde, yetiştirme ortamındaki nem miktarının hava sıcaklığı ve yağış miktarıyla doğrudan bir ilişkide olduğu söylenmesi mümkündür. Bunun yanı sıra yağmur bahçesi modüllerinin (YBM) bulundukları konum nedeniyle çeşitli mikro iklim etkilerine maruz kaldığı görülmektedir.…”

Section: Gi̇ri̇ş (Introduction)unclassified