After an uncharacteristically hot and dry June, Mother Nature just sent us a harsh reminder of her ability to restore rainfall statistics rapidly.
Unfortunately for many homeowners and businesses, this reminder came in the form of a seven-inch downpour over a 24-hour period that is still causing overflow and flooding around local rivers, lakes, and retention ponds.
While it is difficult to predict and prevent the kind of flooding issues that are created by such catastrophic weather events, these events serve as a reminder to property owners, both commercial and residential, to be more aware of the impact that water flow has around your property. Having a well-conceived and expertly executed drainage system around your buildings and grounds can mean the difference between staying high and dry through any weather event, or dealing with flooded yards, basements, parking lots, and roadways.
Generally, rainfall is the catalyst for creating drainage issues but ground water, specifically the location of the water table, can also play a role in the ability of water to move by design. Where land is flat, soils are dense (clay), or the water table is high, a well-designed drainage system is a priority. Consideration of grading, water flow, and proper drainage is essential to prevent minor issues during normal weather and to minimize major damage during catastrophic events like the one we experienced here in northern Illinois last week. Without proper drainage systems in place, water can enter and undermine structures, damage drives and roadways, cause erosion issues, and drown expensive plant material.
It is not always enough to rely on the original drainage plans that were created for your property when it was first developed and constructed. Typically, the more recent the development took place, the better the chances are that the drainage systems were designed and constructed to effectively move water around the property. Older properties may have experienced settling, ground shifts, changes in water tables, neighboring development, or many other factors that can influence the effectiveness of these systems. New or old, it is a good idea to observe and review the water flow issues on your property before a major problem occurs.
SURFACE WATER is one of the more common problems associated with improper or inadequate drainage systems. Sites with clay soils will likely have issues with lingering surface water. By design, developed land should be graded to drain so that water flows through swales or sheet drains across turf or pavement to the curb or storm drain. The reality is that builders don’t always get their grades right and water becomes trapped, causing puddles on pavement, backflow against foundations, soggy zones in lawns, and muddy planting beds.
Downspout/sump pump discharge is a huge contributor to surface water issues. Enormous amounts of water can come off a building’s roof or be channeled into a sump pit during a typical rainfall. This water is often just re-directed back along the foundation of a building where it can go right back into the sump pit or collect on the surface of the ground around the structure.
SUB-SURFACE WATER collects underground, and becomes trapped when there’s poor drainage due to the existing soil structure or high water tables. When it freezes and expands, the potential for damage increases. The frozen water pushes against your foundation and paved surfaces, causing heaving, cracking, and structural damage.
Solutions to improper site drainage can range from the very simple to much more complex depending on the nature of the issue and its underlying cause. Conceptually, solutions fall into two basic categories.
- Capture the runoff and store it for reuse or allow it to percolate back into the soil. Rain barrels and cisterns are used for storage of runoff water for use later as manual watering sources. Dry wells, French drains, rain gardens, and specific soil amendments can be used to collect and redistribute water back into the surrounding soil.These solutions have many environmental benefits such as reducing runoff from your property, filtering runoff, watering your yard, and recharging groundwater.
- Intercepting and redirecting runoff provides an opportunity to safely discharge high volumes of water to a place away from the problem area(s). This can be done using swales, French drains, catch basins, underground pipe assemblies, or downspout/sump pump extensions with splash blocks. These methods of rerouting water can also be combined with other capture and storage elements to provide even more benefit.
Please make note that whenever you are redirecting runoff, you must send it to a suitable outlet. Discharging runoff to an unsuitable area will just move the problems downhill. Be aware that redirecting runoff without collecting it or allowing it to percolate into the soil can negatively impact neighboring properties.
The first step in solving drainage issues on any property is discovering that they exist. Problems like foundation seepage and erosion might not be obvious until a major issue develops at which point resolution can be expensive and complicated. To become aware of potential trouble spots, walk your grounds after a rainfall event and look for places where water has collected.
Does it take more than an hour or two to dissipate after a heavy downpour?
Are there signs of erosion around the downspouts or sump pump discharge points?
Are you finding soft, wet spots in the common turf areas that do not dry out readily?
Are you seeing a decline in the health and appearance of plant material located in the collection areas?
These are just a few of the signs that water is not percolating or moving appropriately around the grounds of your development or commercial property. Time to consider having an expert come out and assess the problems. ILT can do simple visual inspections or accurately read existing grades by laser transit to establish the exact topography no matter how flat the site may seem.and determine precisely where and why water is moving the way it is on your property. From that information, we can evaluate and present potential solutions for your consideration.
While last week’s flooding can serve as a reminder of the devastating impact heavy rainfall can have, it does not take a seven-inch downpour of water to cause damage around your property. Finding and resolving water flow issues before they become expensive problems is always a better solution.
Call ILT Vignocchi today and we can start a conversation about resolving water flow issues at your HOA or commercial building.
Growing plants on rooftops is not a new concept. Centuries ago northern Scandinavians harvested sod from their surrounding landscape and placed it upon structures to create effective insulating and water resistant roof systems. The Vikings who explored the upper Atlantic built grass-covered homes where they settled and in Iceland sod roofs and walls have been used for hundreds of years.
Although the living roof or green roof has been in use for a long time, modern green roof technology has helped to elevate this building method from a crudely effective construction element to an aesthetically pleasing, ecologically responsible building solution for age-old building problems and current environmental concerns.
A green roof or living roof is a roof of a building or other structure that is partially or completely covered with vegetation and a growing medium, planted over a waterproofing membrane. It may also include additional layers such as a root barrier and drainage and irrigation systems.
Green roofs can be very basic, known as extensive green roofs that incorporate drought-tolerant, self-seeding native ground covers such as sedums, grasses, mosses and prairie flowers that require little or no irrigation, fertilization or maintenance. These green roofs are lightweight, inexpensive, and can be retrofitted onto existing buildings, often without significant alterations or additional structural support.
Intensive green roofs are more elaborate roof gardens designed for human interaction. They generally have a relatively flat roof surface or mild slope and allow for a larger selection of plants, including shrubs and trees and require specific engineering to be able to conform to the weight load requirements.
Today, the green roof is gaining in popularity as an environmentally conscious architectural expression that is a viable element of any sustainable landscape management plan; and here is why:
- Storm-water runoff will be greatly decreased with the utilization of a living roof. The growing medium and the vegetation of a green roof retain large amounts of storm water and release it back into the environment. A typical green roof can absorb 30% of the rainwater that falls on it, reducing the amount of water that goes through our waste water systems.
- It is a common misassumption that a green roof system will have a deleterious effect on the integrity of the roof system. Quite the opposite. A well designed, correctly installed green roof will protect the waterproof membrane that lies beneath it and, in turn, will extend the overall life of a roof. Recent studies indicate an increase in life span of almost double.
- Green roofs absorb carbon dioxide that contributes to global warming; and the slow transpiration of water back into the air creates a cooling effect that helps reduce the heat retention and emanation in and around your building.
- In addition to the energy saving features described above, the actual mass and density of a living roof will provide excellent sound insulation for a building as well.
- And let’s not forget the aesthetic benefits of the rooftop garden. The roof garden intermingles the pre-construction environment with the built environment creating a sustainable cooperation between development and nature. People love to interact in the relative secluded natural setting created by the intensive garden on a rooftop space. Additionally, they benefit emotionally and psychologically from the ability to even look upon the greenery of an intensive or an extensive roof top garden.
Green roof technology was re-invented in Germany in the mid-20th century and quickly spread throughout Europe mainly due to its restorative environmental impact.
Today, Chicago has been a leader in green roof installations with up to 7 million square feet on approximately 500 rooftops; the most of any city in the United States. The benefits of the green roof have not been ignored by suburban businesses and multi-family residential buildings either.
Corporations, commercial building owners, and homeowners associations are looking for solutions to increase employee well-being, decrease their carbon footprints, increase their LEEDS scores, and differentiate their properties from their competition. The rooftop garden has proven to be just such a solution.
Reach out to ILT Vignocchi today to inquire about the potential for your headquarters, office building, clubhouse, or other structure to benefit from a green roof installation.
This 2016 report sheds some light on the landscape industry as well.
We learn that the trend for larger homes is still on the uptick. The trend challenges landscape architects to combat municipality’s permeable surface limitations with permeable paving or vertical gardening when creating outdoor spaces.
Another popular trend fueled by an increase in median age is being mindful of accessibility issues. This effects outdoor spaces as well and must be thought of ahead when creating walkways, gates, and outdoor entertainment spaces.
One of the most interesting and most pressing trends is not the increase in those interested in high end landscapes, but those that also seek ones that require low irrigation. It is something that we hear frequently from our customers. “I want something low maintenance.” It is heartening to see that a sense of responsibility to environmental preservation is continuing to creep into design fields.
As design professionals it is important that we don’t design inside a box. We try to keep abreast of all sorts of industry trends so we can deliver the most thought out products for our customers.
Our industry is one that produces a lot of waste and from our equipment, a good bit of pollution. I’ve always found it ironic that we as individuals are driven by an overwhelming love of the beauty of nature and all it provides, but as one large machine, we seldom exercise a desire to protect that which we love on a larger scale.
To a certain extent we are limited pursuing greener methods on all sorts of fronts, state and local ordinances, competition, even our customers.
However, I recently heard about a project in Oregon that inspired me to push back on those restrictions to better do our part in saving our planet.
There is a new proposed development in Oregon that will have no carbon footprint. Seriously. Think about that. 100 percent of the developments water will come from captured precipitation or reused water that is appropriately purified without the use of chemicals. In addition, 100 percent of all stormwater and building water discharge will be handled on site. The development will also create 100% of its energy on site through self-sustaining energy generation and distribution systems.
The kicker…this is a 200,000 sf facility.
Now think about your water usage and the amount of water run off at your home. Say your home is 4,000 sf. This development will deal with 50 times the amount of water that you are. It is mind boggling yet undeniably inspiring that the developers and investors involved decided to pursue sustainability on this level. If they have the dedication to a more conscientious way of living, think about what we could accomplish in our own small spheres.
EASY STEPS TO SUSTAINABILITY
1.Grow your own vegetables: Even if all you have is a balcony you can achieve tomatoes, green beans, cucumbers, herbs…
2.Frequent your farmers market and begin to buy local.
3.Use a rain barrel to water your garden.
4.Bring bags to the grocery store and everywhere else: I see so many folks bring reusable bags to the grocery store but rarely at places like Target, Walmart and other stores they could be used.
5.Embrace thrifting: The ultimate in reduce, reuse and recycle.