Do we need a new dam in the Orange river? 85 years history of the flow of the Orange river.
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- Опубликовано: 13 сен 2024
- It is a flood in the Orange river that sparked my research into the history of the river. knowing the past prepares you for the future.
The recent 3 years of flooding had many ask the question whether this has happened before or whether a change in climate conditions is driving it.
The video looks at the data , not so much pictures, but i hope it can convey somewhat of a picture of the rivers change over the past 85 years.
Excellent Jors, thank you for your labour of love, passion and enthusiasm. Truly appreciate the huge effort and time taken to produce this video. Love the drone footage too - clearly depicting the addage, "river of life".
Thank you Bridget, I apreciate your feedback.
...could not have stated it better. Thank you Jors Malan forf giving that mighty and beautiful river, it's voice.
Wel gedaan!! Groot respek vir jou standvastige lewensuitkyk,analitiese vermoë en vasbyt daar in n dorre verlate omgewing...
Baie dankie Gerhard
Very informative and thank you so much for all your efforts and work you have put into this video. I congratulate you. Well done.
Very informative Jors we thank you for your long hours preparing this. We are in class learning here
Not forgetting to mention that you’re a national asset keep up the good work 💪🏾
1000% agree for the applause on Jors being a national asset. Ek is ook trots dat u nie net die informasie aan gee vir ons inligting nie maar te vestaan wat gebeur rondom,bevoorbeeld,om ons,agric, maar ook fabrieke,myne,...Ek is ook bly dat univetsiteit se leerlinge ook hierdie platform gebruik om hulle geleenheed n biekie groter en te kan gebruik om somer baie debate te kan kry in, en mense te begin leer en ook waardeur wat Groot mense soos u n verandering te bring in ons land en hoop te wys vir die toekoms van all Suid- Afrika se mense.Ek was so trots en gelukkig om aan u se channel bygeloop.Ons regtig waardeer die moiete dat u het en soo baie werk kan kolleckteer intesen u se familie lewe en ook hulle tyd,groete aan u se familie oor hulle help om die werk te kan insamel.Totsiens.Verskoon my Afrikaans, in my jare,65 jaare en geen kans het om die taal te praat behalwe hier,dis die rede.Totsiens.
Thank you for the feedback Motlalepule.
@@JorsMalan Pleasure.
That was quite interesting, and your presentation was excellent Jors, well done. Hope you're getting some excellent video footage with the new drone. Looking forward to your future updates on the Orange Rivers, and interesting hikes around your area. Cheers, and Blessings. 👍🙏.
Thanks Jors , knowledge is power and can help us all for future decisions and planning , great work done on the data
Thanks.
lots of work went into that MAte, thx for sharing
Yes, I almost gave up trying to tie it all together, it is easy to do it in the mind, another matter entirely to present it.
Thank you Jors. Knowing drought in the lower Orange Aussenkerr area I think small damwall at the mouth of the river would help in the dry seasons to have water for irrigation. Cheers.
There is/was a dam planned just above Vioolsdrif for that purpose.
Never ever underestimate the intelligence and knowledge of a hardworking, dedicated and caring farmer. Bravo, Jors!
When you are a farmer you are also a doctor, engineer, builder, mechanic, botanist, etc. It is not really just a job.
Thank you Jors! So interesting. I love your videos.
Baie dankie Jors. Puik gedoen!! Ek haal my hoed/kappie af vir jou.
Ek het nou baie beter verstaan en insig.
Nou het ek ook soveel meer waardering vir hierdie groen lint van lewe deur die dorre woestyn.
Ek is seker jou navorsing gaan tot nut en insig wees vir baie ander.
Sterkte en "do zo voort"
Goeiemôre 🌧
Baie dankie vir hierdie video en die tyd wat jy spandeer het 👏
Ek kan my amper voorstel hoe lank dit moes gevat het net om die data en grafieke te doen.
Ek werk met data en in Excel al vir 22 jaar en mal daaroor 👌
Dit reën heerlik hier in die Wes Rand en ek bid die water kom ook by julle uit 🙏
Goeie môre. Jors, baie dankie vir al jou moeite en navorsing om die video te kon maak en die inligting met ons te deel. Dit was baie interessant.
Ons leer ook baie deur jou videos. Nogmaals baie dankie en n geseënde dag.
Absolutely amazing work! Thank you
Thanks for your insightful analysis.
Another factor of long-term concern is the effects of silting, both on dam capacity and the fact that the silt itself largely comprises topsoil - the basis of all agriculture.
Wow Jors what a super video. It must have been a real labour of love, I learnt so much. Thank you.
Thank you for the feedback Frances.
Dankie Jors, goeie inligting en n klomp werk van jou kant. Doen so voort, dankie.
Thank you for effort 👌 really interesting
Wow Jors. You must have put in a helluva lot of time and effort on this one. Brilliantly researched and presented. Thank you very much. Many, many years ago (I'm surprised I can remember that far back) I lived in Prieska for a year while working on the construction of the new large diameter water pipeline from Prieska to Copperton for the new copper mine there. I arrived late at night in August 1970 and rushed down the next morning to see the mighty Orange river. I was bitterly disappointed to find this very wide dry river bed with a trickle of water running down the middle. The people in Prieska told me to wait until the rainy season, the river would come down in a flood of water carrying trees, cows, sheep and everything else with it. Everybody would rush off to Augrabies to watch the flood go over the falls. Sadly, I never saw it because that year they closed the new dams under construction and caught the flood waters. The river just rose slowly until it was as wide as the river bed. When I first came across your RUclips channel I finally got to see the Augrabies in flood. I look forward to your drone footage of it. Thanks very much for filling in a gap in my memories.
Dankie Jors.Baie leersame video.Dankie vir die werk wat jy ingesit het om dit vir ons te kan wys.
Fascinating Jors...thanks for your time, hope you enjoyed developing a 'picture' using the data, as much as we enjoyed watching a 'picture' emerge for thousands of figures.
Your insights are invaluable. Thank you for sharing so generously. Ruth Dawson. Rustenburg NW
Great video and thank you for making the time in your very busy days to collect and make sense of all the data and then compile it into a video. Bravo
Sjoe dis baie inligting om te verwerk...baie dankie vir die harde werk...sal die video nou weer moet kyk om alles in te neem...en die laaste lugskote laat my dadelik dink aan... " A river runs through it"...baie mooi..
Ek het daai data vir dae lank gesit en deurkyk en moet kort kort weer gaan kyk daarna, dit is baie om in te neem.
Môre Jors. Baie dankie vir die moeite wat jy insit met die videos!!!
Een vraag - op 01:34 tydgleuf van video, wys jy vergelykende "landscape" fotos. Wat vir my opvallend was, is dit lyk of die berg in die agtergrond verskeie veranderings ondergaan het. Indien so, wat was die tydperke tussen die fotos?
Alle sterkte vir die boerdery en asseblief, bou voort op 'n uitstekende kanaal!!! O ja, like jou nuwe drone en gepaardgaande beeld-materiaal
Goeie more Ryno, die berg het nie fisies verander nie, die kleur in die fotos verskil net baie wat verskillende klip kleure laat uitstaan. Ek het daardie ou fotos in 'n video aan die begin van die jaar vergelyk met nuwe fotos om die 1988 vloed met nuwe vloed te vergelyk en dan sien jy die berg beter.
That was enlightening. I leant more than I did in class
Indeed your knowledge and understanding is to admired
Thank you and well done Jors
Wow, that was in-depth. You really did a great deal of research and then put the data in a way that can be understood by all. Thank you so much for your efforts. I think the river runs through your veins. Regards Val
Thanks Jors, very informative. The double spikes in volume of water you mention in your video. One variable to consider is the dam levels prior to the spike (available storage). The floods of Nov/Dec 2022 come with the 4 major dams already at about 95% capacity, plus Lesotho dams pretty full. I was at Gariep for a tour where i was informed its lowest level was 19% and it was full within a month or two. The point I'm making is the impact of flood levels on the lower Orange is definity determined on the available storage at the various upper dams. A lot to digest, but very informative, thank you.
Yes the status of the dams before the rain season plays a big roll. it is one of the big thinks that gets discussed early in a rain seson, should the create more flood control capacity by releasing more water or not?
A 2000 Cumec constant flow will fill the Gariep from empty within about 1 monthand we saw inflows of about 5000 in hte last 2 seasons, so it can certainly fill up quick.
Great Job Jors. Very educational. Keep up the good work. Recommending your channel far and wide.
Thanks Random Dad ( interesting name), much appreciated!
That was really interesting! Thank you so much for all the time it took to make this video!
Brilliant video - thank you so much.
Thank you once again for this truly interesting bit of education, I especially appreciate the time you took to draw this table to better educate us, South Africa should be so proud to have an educator such as yourself, we feel your passion. Thank you/Dankie
It is a pleasure to hear how people enjoy something like this, not only because of the work involved , but also because of the shared interest.
Hi Jors, this was a super interesting video. Did you reach a conclusion regarding the question of frequency of floods in relation to global temperature rise? You've mentioned before that we are in an extended La Nina, which has brought more rain during the summer seasons. Can this be attributed to climate change? Historically have we had these many years of consecutive "High Flow" seasons? Once again thanks so much for your time and effort to research this important subject. Please keep them coming. Maybe you can interview some academics on SA's hydrology history, Dam design, basically all things water. This channel could really take-off in a big way. Please keep it up!
I don't think we have enough data to say anything conclusively redarding climate change, the early 30's looked pretty much like the current 3 year rains. The mid 70's the same which points to a 40-45 year cycle. Then there is the smaller 11 year cycle that give you roughly 3 wet years, 5 normal years and 3 dry years, though the river seemed to have run dry for most years before the building of the dams. So much more information, it is a bit heavy for a one man show like mine, but hopefully in future i have more time for the channel.
Great video, thanks for your hard work and the information 👌
Wonderful! Much appreciated. Most educational and insightful.
Wow Jors wat 'n opsomming my vriend. Wonderlik gedoen. Hou so aan geniet jou kanaal geweldig... 👌
Highly interesting! Thanks for the explanation on why building more dams in the Orange/Gariep is problematic. (I am actually more impressed with your explanation of DATA, INFORMATION which leads to WISDOM...))). Superb drone footage, thanks.
Very interesting. Thanks. Was a great video
Dankie Jors,jy is n deeglike man,ek waardeer
Thanks Jors !
Most informative..!
In the mid 60's a Senior Mentor & myself worked on a Report to optimize water useage from Lake Kariba to provide and top up the Vaal Triangle shortage during the Industrial Boom..aswell as a Fuel Return Pipe Line...!
The Tugela Basin Development at the time, was way over due and snubbed for political reasons by the the then " Powers in Command " !
The Report progressed to BJV's attention thru' the hands of a sharp NP Councillor from JHB at the time, but sadly came to a grinding halt, obviously to apply Political pressure on the then UDI Government...!
The moral of the storey is that...sadly. " Politicians lie the minute they open their mouths "
Au-revoir..!!
Howdy Jors
Once a Hydrologist. always a hydrologist. I am one
That was an excellent synopsis, in general
Maybe do a literature search for publications by Waterwese on your interests. Could add
The dams obviously dampen rampant floods that would have occurred prior
Those floods created the relatively fertile flood plains upon which your Company is farming
As an aside. there's a dam named Smartt Syndicate Dam. 103 million cubic metres capacity
It is/was? a "make hay while the sun shines" dam. Absolutely no sustainable yield. no matter how big it is
Which matters
This is one of your best videos Jors, thank you. It would be nice to adjust your trends with something like annual rainfall as well as your years of dam building as you have done into a single statistical framework to try and adjust the trends. Otherwise very brilliant you do.
Thanks.
Simon
Thanks, that means a lot to a hobiest amateur hydrologist coming for a real one.
I wanted to expanding a lot more, I like doing this kind of thing, but it took a lot of time and I had to finish this video there otherwise I would never get it done. I have a lot of information of early farming of the flood places that also interest me.
Wow Jors dit was nou Baie interresant!!! Those pictures you had on!!! Brilliant
Jors
Keep it coming
That drone of yours?
It's Golden. That is opportunity
You live in a unique place. A fabulous place
Showcase it
PS - Richtersveld
I am working on that Simon.
A lot of research and work went into this video. Very informative. Was wondering about it why a dam was not build in the lower Orange. A couple of decades back, the then government wanted to build a dam and want to put that whole area West of Pofadder under irrigation.
This is fantastic Jors, great work and fascinating!
Many thanks!
*Wow! Very interesting stats. Thank you for sharing!*
Such a thorough and informative video. Thank you Jors.
Before I stumbled across your videos I didn’t even know about Augrabies 😢😮
I am sure you are now thinking about making a trip there?
Very interesting. Thank you.
Uitstekende video Jors. Mens moet in gedagte hou dat die bevolking ook vergroot het mbt waar die water heengaan. Die Lesotho hoogland waterskema het ook n geweldige invloed op die Vaaldam. Daar gaan nogal baie water hoeveld toe van die Katsidam af.
Ja, sover ek verstaan n konstante 70m/s gaan na die Vaal toe.
Enjoyed this very much. Great work.
Helpful presentation! And reassuring that the dams make a difference for the good. We don't need a river that can't reach the sea like the Colorado.
Brilliant video!! Very, very interesting. Need to watch a few more times to digest all that info...
Thanks for your efforts in putting together something so informative....
Glad you enjoyed it, and thank you for the feedback.
Baie dankie, dis goed om alles in perspektief te sien
Ek hou ook daarvan om die groter prentjie so te sien.
Thanks Jors - I now understand why it take so long to make the video. - Well Done!!!! - Maybe just maybe one day you can make video of the geology of the areas the river flow through.... Maybe I can assist with it....
Thank you Jors ! Absolutely well done. After keeping rain records for 55 years here on the East coast, it looks to me as though climate change is a myth, but yes interpretation of results is often difficult. One thing that surprised me was the actual amount of evaporation just from our swimming pool. Extrapolating this volume to the size of a dam, particularly the inland dams during a drought adds up to quite a few litres of water, hence the deeper the dam is per unit area, the lower the loss must be.
Mike it is always a pleasure. Keeping rainfall records for 55 years should make for very interesting data.
Our evaporation here is extremely high, a Relative Humidity of 40% is high for us and I have seen an RH of 3% at 48 degrees. It does help with cooling your body through evaporative cooling.
Awesome compilation, Jors !
Thanks for your diligent research, passionate interest, professional presentation and unique approach to this life-giving sustainable, as our Lord waters our land.
Thanks Joe
WOW!!
that is most excellent, thank you for all the research. Very interesting.
i do feel that you had alot of data and could have made a very long video.
many thanks for your research, info and dedication
Baie interessante ontleding Jors! Dankie!
Jors thanks for your fanatic presentation to us!!!
Thanks for the feedback Esther
Dankie Jors.
Jy het baie moeite gedoen.
Baie insiggewend.
Groete
Very interesting , in your opinion if a new dam or dams were to be considered where do you think they would situate them ? Thanks for sharing.
One was/is considered to be built just upstream of Vioolsdrif, I don't think it is going to happen though.
I don't really know whether there are really good places remaining, and by that I mean places where it can be done cost effectively without submerging large area of good farm land.
The Katse must also be taken into consideration as it feeds the Vaal system, however I do not think data is available of the impact it has on the dam.
Currently the Lesotho government is builing the Mohale dam to feed the Katse but due to bad governance the project is years behind schedule.
To build a new dam is also a very complex situation. The amount of land taken up by the water stored in the dam as well as the environmental effect are but two aspects to be considered.
Baie interresant, Dankie.
Baie dankie Jors, altyd lekker om na jou videos te kyk, baie insiggewende syfers wat jy hier gegee het, sal se julle kan doen met nog 'n dam maar 'n medium grootte.
Baie intressant. Knap gedaan Jors. Baie dankie
Baie dankie Jors - baie insiggewend en interresant - ons leer lekker by jou!🌿
Thank you Jors well presented
If possible a documentary on the irrigation canals in the northern cape
Maybe one day, that kind of video is full production and a bit out of my reach time wise at the moment.
Excellent Presentation Jors. Very informative. One question though, Does the Molopo river system make any difference in the flow in your area as it joins the Orange below Upington? Or it just dies out in the Kalahari?
The last time the Molopo has flower into the Orange was 100 years ago, I do t know the exact date, but it got close to the Orange early this year. It will be a great event if it does so.
Very interesting analysis. Great video.
Thank you .
Absolutely fascinating, than you, Jors. I have been riveted by your updates over the last few weeks and I think it is safe to say that we would not have visited Augrabies had it not been for your epic footage of the falls. We swept past Pella on our way there last weekend, and though the levels were not what we saw in your footage, we were not disappointed. Your latest video analysing historical flow and capacity data in the Vaal and lower Orange, has been fascinating too. Thank you so much for opening up a little known corner of the country for us. The drone is a great asset.
Thank you for the feedback Martyn, it is so good to hear.
Uitstekende werk! Baie dankie Jors hierdie syfers is baie insiggewend.
Baie interessant, baie dankie. Uitstekend aangebied. Dis verblydend om te hoor iets in hierdie land word nog goed bestuur deur ons liewe regering en dat daar nie 'n spike in die grafieke is sedert 1994 nie!
A big tank you keep well 👍👍👍👍🙋
Deksels goed Jors.
Baie dankie.
Fantasties. Baie dankie!
Baie dankie, Jors.
Hi Jors, very informative and interested information, mens is nooit te oud om te leer nie, hulle noem ons mos hier rivier/kanaalape,maar daar gelaat, het groot geword en baljaar in die Oranje,,, daarom vind ek die inligting baie insiggewend,,, geseende aand en nagrus vir julle en lekker slaap. Baie dankie....
Ek dink dit is n besondere voorreg om by so n rivier groot te word, jy beleef ervarings waarvan ander net kan droom.
@@JorsMalan presies
Very informative. The amount of data you worked with and what you eventually got down to is astonishing. Well done! for interest sake, what is the water need, as an average, for the farming activities you are dealing with on there?
Our farm use 6 500 000m3 of water per year.
@@JorsMalan Dankie. Sjoe, dit werk dan omtrent op so 178milj liter per dag? Doen julle alles drup besproeiing of 'n kombinasie van besproeiingsmetodes?
Would dredging the the dams in the drought seasons not help to increase the volume of water held when the rain returns
What is the depth of the orange river ?
Intressant Jos dankie. Ek is beindruk met die drone. Goeie kwaliteit en lekker hoog. Net n vraag, waar pas Sterkfontein dam in die prentjie?
Sterkfontein is almost a topic on its own, it is a very large dam, but with the smallest catchment area. due to the small catchment area it is not in danger of flooding and therefore it is unique in that it has no spillway. though it stores a huge amount of water it does not impact much by way of flood or flood control.
Ek geniet dit om jou omgewing te sien. Was jare gelede laas daar. Watse tipe, model en soort drone het jy aangeskaf ?
Dit is n DJI mini 3 Pro.
Baie dankie vir die beeldmateriaal Jors. Dit is baie insiggewend.
Vriende van my wat boer langs die Oranje opstroom van die samevloeing met die Vaal het op die plaas Torquay geboer. Daar was in die laat sewentigs ‘n volledige opmeting gedoen om ‘n derde dam in die Oranje te bou naby Douglas. Die voorgestelde dam sou die Torquay heet. Ek het ‘n ou Suid-Afrikaanse kaart wat die voorgestelde dam reeds wys wat dit beskryf as “Torquay (Proposed)”.
Nils
Baie dankie vir daai inligting, ek weet dat daar nog projekte was, ook om water van die Oranje na die Gamtoos vallei en die Lankloof te neem, ek wonder of dit met die Torquay te doen gehad het.
Brilliant
Thank you.
Baie interessante video, dankie oom Jors.
Wow, deep research done for this video
What about the impact of sterkfontein dam near harrismithwhich feeds the vaal dam
Sterkfontein dam, athough a very large dam has only a small catchment area and is designed primarily for storage with no need to or capacity to control floods. it therefore has a big impact on droughts , but not much on floods.
As the region is definitely headed for increased drought due to global warming, building more dams surely means disaster for the river's ecology and therefore, everyone living below the dams.
Recently, there has been flooding In the orange river, in Upington. The Upington relies more on Agricultural activities which is of economic importance for the country as it brings in revenue, however due to the exercissive consumption, my prediction is that over the next decade the quality of water of the orange river In the region will deteriorate.
@@EmihleMarambana Global warming is the wild card for many such vulnerable ecosystems worldwide. Everything is happening in excess - where there were once seasonal floods, now the floods are ten times more severe... I don't actually know what to suggest, especially as the region is definitely headed for drought and we have a relatively inactive and incompetent government at the moment..
Baie dankie was insiggewend en interesant
Is the river keeping the desert back or is it slowly keeping in?
The Dessert is not moving like the Namib desert does, so the rive is just a constant green ribbon that cuts through the middle of it.
Jors
Jy kan heelwat statistiese inligting uit die lewenswerk van Peter Tyson, emeritus professor van Wits Universiteit, opdiep. Werklik goeie navorsing.
Baie dankie, ek sal dit opsoek.
Dankie vir jou video Kan jy asseblief n video maak van jou drone asseblief Meer info en waar het jy hom gekoop asseblief Sal dit waardeur
Ek sal hom nog eers moet leer ken voor ek 'n goeie video oor hom kan maak. Ek het by www.droneworld.co.za gekoop.
Baie interessant, Jors. Dit het my genoop om my 1970 boek deur FA Venter, net getiteld Water, te gaan uitgrawe. Op bls. 212 van dié boek bespreek ene Johan Nel die bouery van die Gariepdam (destyds die HFVW dam), met al die detail oor beraamde inhoudsmaat (5960 miljoen m3), wal hoogte en lengte, ens. Hulle sê die wal sal sterk genoeg wees om ń vloei van 28300 m3/sek te hanteer, "want 1874 se 11300 m3/sek was die grootste vloed wat tot nou toe (1970) by Hopetown gemeet was".
Dan nog iets wat die boek noem, is dat benewens die Torquay dam wat ook beoog was, daar sprake van nog vier damme in die stuk tussen waar Namibië se grens begin, en die rivier mond!
Dankie, Ek sal daai boek moet gaan opsoek. Die ander damme laer af sal sekerlik kleiner moes wees?
@@JorsMalan Jy gaan meer nut uit die boek kry as ek. Gee asb jou e-pos adres, dan kan ons privaat korrespondeer hoe om die boek by jou te kry. Ek woon in die Strand
@@ericsa2636 Give that man a Bells! Great to see that such a rare book will be going to Jors. Ek is seker daarvan dat jy (Jors) die inhoud sal verslind en vir ons in een of ander formaat die relevante inligting eendag vir ons sal teruggee.
Go raibh maith agat as físeán an-suimiúil. Ek sal bereid wees om by te dra tot Patreon of 'n koffieblad om jou koste te dek.
Dankie George, jy doen alreeds deur jou kyk en komentaar.
baie dankie oom jors