MHP Project Development - Vancouver Island


Affordable Container Homes


Joint Venture with principal back in six months and ONGOING INCOME


ProwLock Window Guard – KickStarter Investment


CAN/AM Carolina Sporting Camp, Boat/Hunt/Fish Nature Retreat


Equity investment in a unique healthy snack poised for exponential growth


Micro Cannabis Facility (Selling 49% Preference Shares)


Personal Robot: RoboButler


Automotive pre-approval software


Athlete Owned Sports LLC


Partner To Assist/Invest in Continued Growth


Award Pool - Blockchain based challenges for audience engagement & gamification


Cold Steel Formed Framing Manufacturing


500k for 49 % of the company US PATENT


Profit Within 2 Weeks. uVideo Meet on Google Play Store, for 2 years.


Money Service Business, Financial Technology Opportunity


Passive Homes built at 50% of cost that sell for 20% more then any house. Done in 14 days on site


Mobile app for Canadian mortgage agent services


Celebrity Skincare Brand Marianna Naturals Corp. Seed Round 2020


Invest in an up and coming Energy Beverage Company


Groundbreaking innovative technological solution for e-commerce


AiDA: The Automated Intelligent Drive-Thru Assistant - Seed Investment for an emerging market!


A perfect track record, we earn you solid and secure return on opportunistic real estate investments


Well Established Agriculture Company looking for silent investor for acquisition funds


Luxury Online Leather Bags Seed Investment


T3 Endeavor Canada (British Columbia)


Loan Investment in Business


Looking for my Paul Allen


Capital Management with strict risk control


Funding need for a startup publishing company


Environmental products marketing


Marketing, advertising and business management


JV partnership for one/multi real estate investments


Indoor & outdoor farming from scratch with Timber Assets in Northern Alberta


11 Canadian retail plazas for sale


Investment Group raising equity for Transportation Acquisition Target


Real Estate Investor Club


Growth Of A Tree in it's Fastest Form


Temporary working partner to help scale this business.


Mapsted - Location Positioning Technology



Canadian Investment Network

Recent Blogs

Pitching Help Desk


"Joined, submitted, we're moving forward. Excellent site, thanks again... "
Steve Smith - EquipmentFX

 BLOG >> Recent

Mapping Watersheds [Nature
Posted on April 4, 2018 @ 11:58:00 AM by Paul Meagher

This blog is a continuation of my recent blogs on rivers and flow patterns (see Part 1, Part 2, Part 3).

If you want to understand river flow you will need to study some watershed maps. The watershed of a stream is the collector area that feeds water to that stream. Properties of the watershed determine how that watershed responds to a rain event. The watershed response determines stream flow volume.

A digital elevation map (DEM) can be used to render the surface of the watershed landscape. Other maps can be overlayed onto this map to indicate, for example, infiltration rates and hydraulic roughness. Finally, if you overlay a grid onto these maps you can compute on a cell-by-cell basis (using slope, infiltration, runoff, roughness as parameters) the contribution of that watershed cell to the stream flow. You can add precipitation to this model to compute the response of the watershed and predict flow volumes.

This is a physics-based approach (versus the more common empirical/statistical approach) to simulating and predicting stream flow. It sounds fairly simple in theory but there are many details that need to be figured out if you ever wanted to do this in practice. A good book for learning those details is Distributed Hydrologic Modelling using GIS (3rd Ed., 2016) by Baxter E. Vieux.

A Geographic Information System or GIS is a piece of software that not alot of the general public uses. Now that I have a reason to use one, to map watersheds, I began looking around for a free opensource GIS system. From my research, the premier opensource version appears to be QGIS.

I am using a windows desktop operating system for the software so I downloaded an older stable 64-bit version (2.18.18-1-Setup-x86_64.exe) from This is a large download that installs alot of opensource geo software for windows so expect download and installation to take awhile. The latest version (v 3.0.x) can also be downloaded and run alongside the older version if you want to experiment with a buggier version of the software without as much tutorial support as the stable version. The QGIS software can also be run on other operating systems by finding the appropriate repository to download from.

My first impression is that QGIS is full of features that would take quite a while to master. There appear to be good learning resources out there for it. It is used in industry and by governments so it is not immature software. Powerful geomatic software is now within the reach of the average Jack and Jill.

To understand river flow we have to understand the larger context of the river. That larger context is called the watershed and it can often be defined precisely based on how the land drains.

A watershed is like the market for a product or service. It may be a small watershed that supplies a small first-order stream or it may be a large watershed that supplies a third-order stream. Properties of the marketshed determine the flow of traffic to your product or service. If you have alot of time on your hands, you might use GIS systems, overlays, and grid-based computing to model how consumer traffic might flow to your product or service.

Those who advocate for a bio-regional economy often make use of the watershed concept to delimit what is considered to be the local economy. Proactively, you should make an effort to trade with those who you share a watershed with. That seems like a crazy idea in some ways but in other ways it is reflective of how things worked historically and that history still bares an imprint on current trading practices if you look at trade through a watershed lens.

Another reason to trade with someone who you share a watershed with is because if that person lives upstream or downstream from you, then you are all interconnected by the various uses that you make of the water resource. Water quality and volume is a function of the whole watershed, not just some section of it. This is a very important connection that watershed users share and could be the basis of thoughtful trade patterns. Restricting your trade to just those within a certain distance from you (e.g., 100 mile diet) can cut across watersheds. That may not be that important to you, but it is a factor that is perhaps less arbitrary than a simple distance measure for defining what is local or not.

In conclusion, mapping watersheds is useful for understanding and predicting water flows. Techniques and technologies used for mapping watersheds might also be relevant to mapping marketsheds. Finally, the quest for sustainability dictates that the marketshed and the watershed should become more aligned.




 March 2021 [3]
 February 2021 [1]
 January 2021 [1]
 December 2020 [1]
 November 2020 [1]
 June 2020 [3]
 May 2020 [1]
 April 2020 [2]
 March 2020 [1]
 February 2020 [1]
 January 2020 [1]
 December 2019 [1]
 November 2019 [2]
 October 2019 [2]
 September 2019 [1]
 July 2019 [1]
 June 2019 [2]
 May 2019 [3]
 April 2019 [5]
 March 2019 [4]
 February 2019 [3]
 January 2019 [3]
 December 2018 [4]
 November 2018 [2]
 September 2018 [2]
 August 2018 [1]
 July 2018 [1]
 June 2018 [1]
 May 2018 [5]
 April 2018 [4]
 March 2018 [2]
 February 2018 [4]
 January 2018 [4]
 December 2017 [2]
 November 2017 [6]
 October 2017 [6]
 September 2017 [6]
 August 2017 [2]
 July 2017 [2]
 June 2017 [5]
 May 2017 [7]
 April 2017 [6]
 March 2017 [8]
 February 2017 [7]
 January 2017 [9]
 December 2016 [7]
 November 2016 [7]
 October 2016 [5]
 September 2016 [5]
 August 2016 [4]
 July 2016 [6]
 June 2016 [5]
 May 2016 [10]
 April 2016 [12]
 March 2016 [10]
 February 2016 [11]
 January 2016 [12]
 December 2015 [6]
 November 2015 [8]
 October 2015 [12]
 September 2015 [10]
 August 2015 [14]
 July 2015 [9]
 June 2015 [9]
 May 2015 [10]
 April 2015 [10]
 March 2015 [9]
 February 2015 [8]
 January 2015 [5]
 December 2014 [11]
 November 2014 [10]
 October 2014 [10]
 September 2014 [8]
 August 2014 [7]
 July 2014 [6]
 June 2014 [7]
 May 2014 [6]
 April 2014 [3]
 March 2014 [8]
 February 2014 [6]
 January 2014 [5]
 December 2013 [5]
 November 2013 [3]
 October 2013 [4]
 September 2013 [11]
 August 2013 [4]
 July 2013 [8]
 June 2013 [10]
 May 2013 [14]
 April 2013 [12]
 March 2013 [11]
 February 2013 [19]
 January 2013 [20]
 December 2012 [5]
 November 2012 [1]
 October 2012 [3]
 September 2012 [1]
 August 2012 [1]
 July 2012 [1]
 June 2012 [2]


 Agriculture [73]
 Bayesian Inference [14]
 Books [15]
 Business Models [24]
 Causal Inference [2]
 Creativity [7]
 Decision Making [15]
 Decision Trees [8]
 Definitions [1]
 Design [37]
 Eco-Green [4]
 Economics [12]
 Education [10]
 Energy [0]
 Entrepreneurship [66]
 Events [2]
 Farming [20]
 Finance [25]
 Future [15]
 Growth [19]
 Investing [25]
 Lean Startup [10]
 Leisure [5]
 Lens Model [9]
 Making [1]
 Management [9]
 Motivation [3]
 Nature [22]
 Patents & Trademarks [1]
 Permaculture [36]
 Psychology [2]
 Real Estate [2]
 Robots [1]
 Selling [12]
 Site News [17]
 Startups [12]
 Statistics [3]
 Systems Thinking [3]
 Trends [9]
 Useful Links [3]
 Valuation [1]
 Venture Capital [5]
 Video [2]
 Writing [2]