Rotators instead Sprayers

A more efficient head selection to irrigate small landscape and lawn areas is “ROTATOR”. Here are some advantages compared to the sprayer:

– more uniformity, so more irrigation efficiency

– More resistance to wind, so less water waste in walkways and driveways like above photo

– Lower precipitation rate, so longer irrigation time and less run off

– Lower discharge, so lower pipes diameter and larger zones

Photos: Hunter Industries

COVID-19 and Water Resources

Cleveland Dam – March 2020

We are all experiencing very tough times in light of COVID-19, and we must be committed to doing what we can to flatten the curve. Beside the many instructions that we are receiving from the health authorities, we always hear “wash your hand frequently “. As a member of Water Resources Community, we would like to remind that every drop of clean water matters, especially during this pandemic. Our resources are limited, and we should use water in a smart manner and wisely.

What we do in our SWM & ESC plans(4)? Pipes

As hydraulic designer of piping systems in our waterworks, we deal with following definitions on a regular basis:

. Pipe material and structure: homogen vs. composite, single wall vs. double wall

. Pipe mechanical properties against the external and internal loading including stiffness and service/bursting pressure, and working temperature during lifetime of project

. Pipe safety and health criteria

. Pipe fittings, installation and handling

There are baseline standards in the BC Building Code (2018), and we select the piping systems based on the conditions and needs in any project. With 25 years of experience in waterworks, stormwater, drainage, sanitary, and having understanding about pipes technologies , we do this process accurately.

What we do in our SWM & ESC plans(3)? Filters

The filter design around the drain tiles or in any drainage system is a very important task in our designing process. We normally cope with following questions?

  • Organic, synthetic, sand, gravel and what gradation and dimension should we consider?
  • What kind of textile filter and what specification? Non-woven or woven textile? Should we use the common landscape mat?
  • How should we deal with fine soils (clay and silt) migration toward the drain line? what about the plant root penetration?
  • How to design to have a desirable operation and maintenance? Not clogging and blockage mess.

Any project has it’s dedicated design and criteria for the drains’ filter that should be addressed by designer.

Sump Pump matters!

Sump Pump design, installation and operation is a problematic issue in the Metro Vancouver, as it’s failure may cause a disaster! I’ve seen many residential and commercial buildings with flooded basement during my tenure in North Shore; some of them during construction and some after occupation. It doesn’t matter if there is a luxury home theater there or just a normal basement; what matter is the huge consequences, and we as hydraulic designer of sump pumps try to put together with other disciplines in construction industry to solve this problem; even dissolve it.

There are several technical uncertainties in sump pump design which should be addressed by designer, and more than that the following aspects are in the scope of work:

  • Reserve Pumps
  • Cycling
  • Alternation
  • Power Backup
  • Level Control
  • Electric Board’s functionality
  • Audio/Visual Alerting
  • Maintenance and Operation

The last one is the most important topic. The alerting system is a serious issue as well, but not just in an old fashion manner, as it is not smart to wait to face flooding and get alert. We can operate the system more proactively by using the technologies like linking the electrical board with the home security system, if there is any, or we can use the new peripheral devices that enable us to monitor the sump pumps functionality during the operation. There are many of these devices in the shelves of security tech companies and retailers that can work with home Wi-Fi and mobile application.

What we do in our SWM & ESC plans(2)?

Using Federal, Provincial and Local guidelines, standards and Bylaws, we prepare our SWM and ESC plans as per the best management practice (BMP) to mitigate the negative impact of development projects to our environment, especially our creeks and Ocean. To be honest, this approach needs knowledge, experience and passion. I love the following poster which simply compares wrong and right behaviors in urban watershed.

What we do in our SWM & ESC plans(1)? Hydrology

In our hydrologic design, we use the existing recorded or synthetic hydrographs from the integrated stormwater management plans if there is any, or we make the hydrographs from IDF curves ourselves. Any development land even small is an un-gauged watershed with its own criteria which should be addressed technically.