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dbloniarz

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460 weeks ago @ Urban Natural Resource... - April 2010 - Urban Tre... · 0 replies · +2 points

(Page 1 of 3 pages)

The followng 3 Comment Pages show the questions that were raised following Dr. Downing Day's presentation. Please take a look for her responses, which will be coming soon. Thanks, Dave Bloniarz, UNRI Webcast Coordinator.

Meeting Questions and Answers:
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gregory smith Asked: In the forest, after a rainfall, water drips off of a cliff face for several to many days. I understand that water is a bipolar molecule, and attracted to charges in soil and organic matter. Is this how water is held in soil? What is mechanism of water being slowly released and dripping for many days after rain ends?
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Kent Holm Asked: Will the webcast be available in archive form?
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Ian Hanou Asked: For the Jacaranda vs. sycamore example and 1" rainfall, how does the rainfall interception differ with the sycamore being there vs. any other pervious surface, e.g. grass or bioretention? That would better describe the value of trees specifically, not just pervious. Thx.
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Frank Rodgers Asked: Wow! What's with those tree guards? Just how bad do they drive in NY? That must have cost a bundle and will ultimately be an obstruction in the care (and ultimate removal) of the tree.
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Amy Lindsey Asked: One of the concerns with using trees in stormwater management is the effect of pollutants on tree health. What is your take on this issue and what do you think of the possibilitites of using trees for urban water phytoremediation?
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Gary Belan Asked: Maybe I missed it, but how do you avoid compaction from the cars on the pavement?
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Brian Koch Asked: What about Road Salt and Chemicals applied to this permeable pavement?? How does this effect the plants and trees?? Also, what happens when permeable pavement clogs from grass clippings, leaves decaying, etc.?? What happens to runoff??
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Johanna Bell Asked: Did you look at the use of geotextiles or other barriers to root growth in order to protect underground pipes and utilities?
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Johanna Bell Asked: Could you describe the stabilizing "hydro-gel" used to stabilize the structural soils?
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Johanna Bell Question To: Could you describe the stabilizing "hydro-gel" used to stabilize the structural soils? What is it made from? How does it bind the organics, and allow the organics to be accessed by the plants at the same time?
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Phillip Rodbell Asked: So roots do grow through the geotextile? Only value is separation of soil medium from gravel?
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Karen Engel Question To: I was disconnected & may have missed explanation, but....why do you need to use the geotextile fabric at all? What happens if you don't?

460 weeks ago @ Urban Natural Resource... - April 2010 - Urban Tre... · 0 replies · +1 points

Part 3 of 3 pages of Questions for Dr. Susan Downing Day --

Mike Fleischhauer Question To: Has consideration been given to the possible issues created by tree roots continuously penetrating the geotextile (eventually the structural soil settling as the geotextile is destroyed, causing settling of pavement)? Also, has there been study of the longevity of the porous asphalt surfaces under normal use considerations (Ex. Pores pluging as vehichles on surface deposit dirt and oils)?
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Sally Thigpen Question To: Advice from one urban forester to another! When installing underground systems make sure you get your sequencing right with your contractor. Make sure the structural soil or silva cells or root pathways etc. go in AT THE SAME TIME as the utilities and other below ground infrastructure. Contractors think of these systems as "landscaping" that typically goes in last. When they get to it there is no room or it's difficult to maneuver to install
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Dion Doepker Asked: Regarding Structural Soil: Is there a requirement to the type and shape of the rock used for the aggregate?
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Shelley Allen-Czepiel Question: What makes the tree roots from growing up into the pavement?
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Karen Engel Asked: Do you absolutely need to use the geotextile fabric?
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Nandan Shetty Question: NY state stormwater Design Manual requires the use of non-woven filter fabric for bioretention / rain gardens. But tree roots cannot penetrate it. Would you recommend woven fabric for biortention?
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Mike Fleischhauer Question: Has consideration been given to the possible issues created by tree roots continuously penetrating the geotextile (eventually the structural soil settling as the geotextile is destroyed, causing settling of pavement)?
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Stan Kamys Question: Are there calculations to determine what size of cu area will treat the otherwise pervious parking lot for 25yr/100yr storwater calculations? Has the data been used to address stormwater pond configurations with a local water management district and the EPA/DEP rules.

460 weeks ago @ Urban Natural Resource... - April 2010 - Urban Tre... · 0 replies · +1 points

Part 2 of 3 pages of Questions for Dr. Susan Downing Day --

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Travis Thiel Asked: Obviously, most of us see the importance of trees, especially in an urban setting. One thing that hasn't been mentioned or asked about urban forestry is what about the potential impact from leaf litter and nutrient loading from increased tree establishment along or within boulevards and near other impervious surfaces? Little volume would be needed to mobilize nutrient residue and street cleaning processes can't take care of all leaf litter at a reasonable cost. Education efforts to clean up leaves do help, but don't solve the entire problem. We've seen in some of the urban, heavily impervious watersheds here that large fluxes of nutrients are seen in WQ results from storm sewer systems and have to wonder about what this negative aspect and other potential negative aspects may have on establishing new trees or more trees in the urban landscape. That being said, we don't want to work on one problem and introduce others at the same time while dealing with water quality and quantity issues. Any thoughts on this matter?
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Stan Kamys Asked: Are there calculations to determine what size of cu area will treat the otherwise pervious parking lot for 25yr/100yr storwater calculations?
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Jackson Bird Asked: Thoughts on Silva Cells?
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Sally Thigpen Question To: How do you prevent fines from washing out of the pore space when water can move in and out of the constructural soil?
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avery HARDEN Asked: As I understand the new SWM regs for Baltimore County, the places where we have traditionally planted trees around parking lots will now be taken over with SWM structures that preclude having tree roots intruding.
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Steve Findley Asked: What is your experience with road salts and other pollutants running off impervious surfaces affectiing tree growth and health?
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Shelley Allen-Czepiel Asked: What makes the tree roots from growing up into the pavement?
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Emily King Asked: You mentioned that the geotextile is meant to prevent the structural soil from sinking into the subsoil. Would tears in the fabric from tree root penetration affect this function?
________________________________________Mike Fleischhauer Asked: Has consideration been given to the possible issues created by tree roots continuously penetrating the geotextile (eventually the structural soil settling as the geotextile is destroyed, causing settling of pavement)?
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Jennifer Fais Question To: What prevents the pavement over structural soil from heaving/buckling due to root growth?
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Steve Findley Question To: What is your experience with road salts and other pollutants running off impervious surfaces affectiing tree growth and health?
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Deb Powers Asked: Could you repeat: What was the size (dbh) of the large Platinus in the rainfall event comparison?
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Steve Findley Question To: Also, the CU structural soils have been cricized (by Jim Urban) as not providing sufficient organic matreial and water to support the growth. Have you tested other amended soils?
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480 weeks ago @ Urban Natural Resource... - December - 2009 · 0 replies · +1 points

We're working to expedite the Voice over Internet Protocol (VoIP) technology for implementation during 2010, which will streamline the log-on and audio process. Stay tuned...