Floradude Posted September 3, 2017 Report Share Posted September 3, 2017 This morning I saw my first small (long and skinny) raft of lirio drifting off shore of Ajijic. This usually signifies that a good flow of water from the two rivers is entering the lake. A decade or more ago I used to see vast rafts of lirio covering the lake. Now to a question about the Lake Level. I should know the answer because I have lived here a long time and read enough articles about the lake but I do not know/remember the answer. Lake Chapala Weather Net reports the lake level at 94.99 M. Being a science person I know the "M" is an abbreviation for Meter. So the lake is at 94.99 Meters ? We know that Lake Chapala is a very shallow lake and not over 280 feet deep. What does the 94.99 M. tell us? Link to comment Share on other sites More sharing options...
johanson Posted September 3, 2017 Report Share Posted September 3, 2017 Years ago someone determined that the lake was full at a certain point, perhaps a bridge, I do not remember and that level was called 100. So now we are only 5 meters short of what this expert declared the lake to be full many years ago. If we were at 100 most of us today would think that the lake was flooding. The above is what I remember reading many years ago. If I am wrong, someone please correct me. Link to comment Share on other sites More sharing options...
Mainecoons Posted September 3, 2017 Report Share Posted September 3, 2017 4 minutes ago, AngusMactavish said: Would M=milli sate your query? M in this case stands for meters. mm signifies millimeters. The lake is at the 94.99 meter benchmark. Still a ways to go to equal last year's level. Another strong tropical wave headed this way, over the Yucatan right now. Could be another nice rain maker. Note this is not the same as a tropical storm or depression. It is basically a west moving low pressure trough associated with the monsoon air current. At the moment that seems well positioned to send some more rain this way Link to comment Share on other sites More sharing options...
tonyburton Posted September 3, 2017 Report Share Posted September 3, 2017 Pete, your answer is essentially correct. Give yourself an A+. The arbitrary level (cota) of 100 .00 was fixed on a bridge decades ago. The bridge no longer exists, but the cota of 100.00 [elevation 1526.8 meters above mean sea level] has not changed. Owing to various hydrological engineering works, the lake is now considered "full" at cota 97.80. The lake would be "empty" at about 90.00. Link to comment Share on other sites More sharing options...
AngusMactavish Posted September 3, 2017 Report Share Posted September 3, 2017 http://www.ceajalisco.gob.mx/contenido/chapala/ Link to comment Share on other sites More sharing options...
Al Berca Posted September 3, 2017 Report Share Posted September 3, 2017 "The lake currently stands at 59% of its full capacity." This week's Reporter. Link to comment Share on other sites More sharing options...
giltner68 Posted September 3, 2017 Report Share Posted September 3, 2017 Only in MX? But, Angus has the link, it translates roughly to: QuotaA dimension is the numerical value of any level with respect to another level that has previously been assigned a fixed dimension. In all the world is used like fixed level the one of the sea, whose quota is 0.00m. In order to measure the level of the lake an arbitrary quota established by the Engineer Luis P. Ballesteros in 1910 is taken, taking a fixed point located in the old bridge of the Cuitzeo, on the River Santiago, to the entrance of the population of Ocotlán. At that point he was assigned the quota 100.00, which is equivalent to 1,526.80 meters above sea level (msnm).In 1981, the Secretariat of Hydraulic Resources (SARH) established a new equivalence to the boundary of Ballesteros adjusting it 80 centimeters to be at 1,526 msnm. As a result, the maximum capacity of the lake was established at elevation 97.80 (1,523.80 masl), with a maximum depth of 8 meters and a maximum storage of 7,897 Mm3. As to the Reporters numbers, I have no idea where they get them. 3 years ago I contacted them regarding the temps they publish for Ajijic and no one could give me an answer and sometimes they seem to be appropriated from thin air? Link to comment Share on other sites More sharing options...
Mainecoons Posted September 3, 2017 Report Share Posted September 3, 2017 Still roughly a third of a meter to go before it gets back to last year's high. Here's hoping. Link to comment Share on other sites More sharing options...
johanson Posted September 3, 2017 Report Share Posted September 3, 2017 Giltner68 wrote As to the Reporters numbers, I have no idea where they get them. 3 years ago I contacted them regarding the temps they publish for Ajijic and no one could give me an answer and sometimes they seem to be appropriated from thin air? Hey Giltner: At one time the weather given for Chapala came from a weather station at the lake run by the now shut down Mexican weather channel. When that was shut down, I understand or kind of remember that the weather report shown from Lake Chapala, came from data at the Guadalajara Airport, which always was different than the real thing here lakeside. I would have thought they would have used your weather station once you were up and running. Link to comment Share on other sites More sharing options...
tonyburton Posted September 3, 2017 Report Share Posted September 3, 2017 4 hours ago, Al Berca said: "The lake currently stands at 59% of its full capacity." This week's Reporter. Giltner68 - Bear in mind that a small difference in level means a big increase in volume, and the higher the level in the first place, the larger the increase in volume for any given increase in level. The Reporter numbers correspond to the data and reported level (cota) of 94.99. Link to comment Share on other sites More sharing options...
giltner68 Posted September 4, 2017 Report Share Posted September 4, 2017 16 hours ago, tonyburton said: Giltner68 - Bear in mind that a small difference in level means a big increase in volume, and the higher the level in the first place, the larger the increase in volume for any given increase in level. The Reporter numbers correspond to the data and reported level (cota) of 94.99. Gosh, I've lived on or near lakes for the last 35 years and that never occurred to me, the two are related? - well, I'll have to study up on that one - but if you'll read my post again, I was referring to temps. Link to comment Share on other sites More sharing options...
Mainecoons Posted September 5, 2017 Report Share Posted September 5, 2017 Nine millimeter jump in the lake level in just a few days. Really rising more quickly now. 95.09 as of yesterday! Link to comment Share on other sites More sharing options...
giltner68 Posted September 5, 2017 Report Share Posted September 5, 2017 And so, if I'm reading it correctly, that means a big increase in volume? - or did I miss something? Link to comment Share on other sites More sharing options...
cedros Posted September 5, 2017 Report Share Posted September 5, 2017 I would say a good (not big) increase in volume. Another 25 centimeters to go up to reach last years level. Link to comment Share on other sites More sharing options...
Floradude Posted September 5, 2017 Author Report Share Posted September 5, 2017 No wonder I could not remember the answer. Thanks for your information. Link to comment Share on other sites More sharing options...
El Bizco Posted September 5, 2017 Report Share Posted September 5, 2017 As of yesterday 4 Sep the lake was 61.27% full and had risen 22cm in the previous 2 weeks, CONAGUA data. Link to comment Share on other sites More sharing options...
barcelonaman Posted September 8, 2017 Report Share Posted September 8, 2017 Been rising 30mm daily.this time next week should have exceeded last years high.lake normally peaks end October so should be a good year. Link to comment Share on other sites More sharing options...
mkshawn Posted September 8, 2017 Report Share Posted September 8, 2017 220mm/14dias=15.71mm Link to comment Share on other sites More sharing options...
vetteforron Posted September 8, 2017 Report Share Posted September 8, 2017 From Lake Chapala weather with less rain than last year which was just over 49 inches. Go figure? Chapala Lake Level SEP 7, 2017 ▲95.17M▲ 2017 LOW 94.08M HIGH ??.?? 2016 LOW 94.12M HIGH 95.34M 2015 LOW 93.70M HIGH 95.15M 2014 LOW 93.15M HIGH 94.44M 2013 LOW 93.08M HIGH 94.05M 2012 LOW 94.04M HIGH 94.53M2011 LOW 95.20M HIGH 95.44M 2010 LOW 95.06M HIGH 96.62M 2009 LOW 95.44M HIGH 95.83M 2008 LOW 94.53M HIGH 96.72M2007 LOW 93.90M HIGH 95.68M Link to comment Share on other sites More sharing options...
Mainecoons Posted September 8, 2017 Report Share Posted September 8, 2017 Lake Chapala's watershed is to the south and east of us. Although we had very heavy local rains last year, the watershed received much less. This year we are running just a little over average but it is much wetter than last year over the watershed. The remains of Katia could bring strong rains to the watershed and bolster this effect. Wouldn't it be great to see the lake hit 96 meters again? Link to comment Share on other sites More sharing options...
barcelonaman Posted September 11, 2017 Report Share Posted September 11, 2017 95.19 friday. Today 95.28. 30mm daily in my book. Wednesday we should equal last years height with still six or seven weeks fill to come. 220mm/14dias=15.71mm Link to comment Share on other sites More sharing options...
johanson Posted September 11, 2017 Report Share Posted September 11, 2017 This is fantastic as you stated today we have 25.28 and once we go 6 centimeters we will match last years high, something we should reach perhaps Wednesday and looking at the two previous years, the water continues to go up until late Oct. to mid November So our water levels could end up much higher than last year (I hope) Link to comment Share on other sites More sharing options...
mkshawn Posted September 12, 2017 Report Share Posted September 12, 2017 95.19 friday. Today 95.28. 30mm daily in my book. Wednesday we should equal last years height with still six or seven weeks fill to come. Apples vs oranges: results are based on when data was selectively imported. 95281-9519 = 91/3=30.33 1 / 15.71= 0.06365372374284* 30.33= 1.93061744112034 Represents a 19.306% daily increase for the 3 days cited by chapel weather vs the 14days previously cited by Conagua As of yesterday 4 Sep the lake was 61.27% full and had risen 22cm in the previous 2 weeks, CONAGUA data. The rate of increase in the lake level has increased dramatically over this last weekend with much more to hopefully arrive shortly? Link to comment Share on other sites More sharing options...
giltner68 Posted September 18, 2017 Report Share Posted September 18, 2017 The Lake is now higher than last years high with more to come it looks like. Link to comment Share on other sites More sharing options...
AjijicJim Posted October 30, 2017 Report Share Posted October 30, 2017 Where do you find the data on the level of the lake? Is there an url that you could provide to me? Link to comment Share on other sites More sharing options...
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