<div dir="ltr"><div dir="ltr">вс, 3 февр. 2019 г. в 16:38, Paul Allen <<a href="mailto:pla16021@gmail.com">pla16021@gmail.com</a>>: <br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Yes, we could switch to calling them all drains and then adding lined=yes/no, but we already<br>have ditch and drain. I think it's better to fix the wiki than do that.</blockquote><div class="gmail_quote">If it was to select just one tag for the two notions, I would choose "ditch", not "drain".</div><div class="gmail_quote">Most of ditches are drainage ditches, hence usage=drain can be assumed by default if not defined, but renaming irrigation ditches into drains+usage=irrigation sounds incorrect.</div><div class="gmail_quote"><br></div><div class="gmail_quote">Cheers,</div><div class="gmail_quote">Eugene</div><div class="gmail_quote"><br></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">вс, 3 февр. 2019 г. в 16:38, Paul Allen <<a href="mailto:pla16021@gmail.com">pla16021@gmail.com</a>>:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div dir="ltr">On Sun, 3 Feb 2019 at 10:53, Eugene Podshivalov <<a href="mailto:yaugenka@gmail.com" target="_blank">yaugenka@gmail.com</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div dir="ltr"><br><div>There are distinctions between these two terms, otherwise they would not be defined separately.</div><div>In simple words, a ditch is a small open-air man-made or self-formed channel in the ground for absolutely any purpose, both lined or unlined entirely or partially.</div></div></div></div></blockquote><div><br></div>Ummmm, maybe. Maybe not.</div><div class="gmail_quote"><br></div><div class="gmail_quote">Part of the problem, of course, is that English dictionaries are descriptive, not proscriptive:</div><div class="gmail_quote">if words are misused in English frequently enough, that misuse becomes one of the word's</div><div class="gmail_quote">meanings (which is why "cleave" is its own antonym). The fact that "ditch" and "drain" are</div><div class="gmail_quote">often used interchangeably these days doesn't mean that there isn't a meaningful</div><div class="gmail_quote">distinction.</div><div class="gmail_quote"><br></div><div class="gmail_quote">See <a href="https://en.wikipedia.org/wiki/Ditch" target="_blank">https://en.wikipedia.org/wiki/Ditch</a> and <a href="https://english.stackexchange.com/questions/190527/difference-between-ditch-trench-and-gutter" target="_blank">https://english.stackexchange.com/questions/190527/difference-between-ditch-trench-and-gutter</a> - a ditch is a simple, unlined trench for the purpose</div><div class="gmail_quote">of drainage or irrigation. A salient characteristic is that it is unlined. It is used to drain (mainly)</div><div class="gmail_quote">agricultural fields with a high water table. The fact that it is unlined means that water can seep</div><div class="gmail_quote">through the side of the ditch and then flow away. A lined ditch would not work (only water above</div><div class="gmail_quote">the lining could seep into the ditch rather than across the whole height of the ditch). Irrigation</div><div class="gmail_quote">is the same thing in reverse - a lined ditch wouldn't work as well.</div><div class="gmail_quote"><br></div><div class="gmail_quote">A drain is lined to <b>prevent</b> seepage. At its smallest, it is a roadside gutter (open drain) which</div><div class="gmail_quote">usually has frequent openings to underground drains. Or it may be a small channel. The</div><div class="gmail_quote">distinction between a drain and a canal is one we can spend months arguing about. :)</div><div class="gmail_quote"><br></div><div class="gmail_quote">From everything said here and everything I've found on the internet I'd say that lined/unlined</div><div class="gmail_quote">is the only distinguishing characteristic between ditch and drain. Size is irrelevant. There</div><div class="gmail_quote">is a real difference in purpose and on-the-ground appearance between a channel</div><div class="gmail_quote">designed to allow seepage to/from the land it passes through and one that is not.<br></div><div class="gmail_quote"><br></div><div class="gmail_quote">Yes, some mis-tagging is inevitable. If you're using aerial imagery it's hard to tell if</div><div class="gmail_quote"> something is lined or unlined. Or even if it's part of a stream that has been artificially</div><div class="gmail_quote"> straightened. But you can make a fairly good guess in most instances. We also have</div><div class="gmail_quote"> to acknowledge that we rarely achieve perfection but do the best we can and hope any errors</div><div class="gmail_quote"> are corrected later. If we throw away the distinction (they're all drains) it will be harder to</div><div class="gmail_quote">fix than if we keep the distinction and realize that there will be occasional errors.</div><div class="gmail_quote"><br></div><div class="gmail_quote">Yes, we could switch to calling them all drains and then adding lined=yes/no, but we already</div><div class="gmail_quote">have ditch and drain. I think it's better to fix the wiki than do that.</div><div class="gmail_quote"><br></div><div class="gmail_quote">-- <br></div><div class="gmail_quote">Paul</div><div class="gmail_quote"><br></div></div></div>
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