Skip to Content

Orpen Dam.

Discuss the different camps and roads of the Kruger National Park
User avatar
ndloti
Senior Virtual Ranger
Senior Virtual Ranger
Posts: 4958
Joined: Mon Dec 11, 2006 1:45 pm
Location: southern gauteng

Re: Rain in Kruger

Unread postby ndloti » Tue Apr 13, 2010 5:56 pm

Image
A few days ago I was a few seconds too late to capture the best of the sunset painted scene when the sun disappeared behind a cloud .
KNP is sacred. I am opposed to the modernisation of Kruger and from the depths of my soul long for the Kruger of yesteryear! 1000+km on foot in KNP incl 56 wild trails.200+ nights in the wildernessndloti-indigenous name for serval.

User avatar
ndloti
Senior Virtual Ranger
Senior Virtual Ranger
Posts: 4958
Joined: Mon Dec 11, 2006 1:45 pm
Location: southern gauteng

Re: Rain in Kruger

Unread postby ndloti » Wed Apr 14, 2010 7:53 am

Sprocky wrote:Nice pic Ndloti! :thumbs_up:
One question, that flat green section, is that not water? :hmz:


Orpen dam covered with water lettuce , an exotic invader plant which is being fought biologically - a beetle that feeds solely on the water lettuce has been introduced in an effort to control the infestation .
KNP is sacred. I am opposed to the modernisation of Kruger and from the depths of my soul long for the Kruger of yesteryear! 1000+km on foot in KNP incl 56 wild trails.200+ nights in the wildernessndloti-indigenous name for serval.

User avatar
ndloti
Senior Virtual Ranger
Senior Virtual Ranger
Posts: 4958
Joined: Mon Dec 11, 2006 1:45 pm
Location: southern gauteng

Re: Rain in Kruger

Unread postby ndloti » Wed Apr 14, 2010 10:14 am

The beetle is a biological control measure introduced by the KNP alien biota control division .
The water lettuce is an alien (introduced from other continents by man through aquatic animals kept in aquariums or fishponds) highly invasive species which does not naturally occur in RSA and has no natural enemies that utilise it for food , which allows it to increase without its growth being controlled naturally .
Water lettuce (there are also many other alien plant and animal species) then covers rivers , dams and pans preventing the sunlight from entering that is necessary for natural plant growth to photosynthesise , thus natural aquatic plant life dies and the chain repeats itself when the fish die and other organisms cease to be viable due to lack of oxygen from the natural plant life , wherupon animals & birds that feed on the fish move away along with their associated predators .

The roan antelope numbers decreased due to the provision of unnatural water points which attracted other antelope which were strongly competitive to the roans more selective feeding needs .

As a matter of interest , the biggest long term threat to the KNP is the potential loss of biodiversity due to invasive species .

Did you know that there is an area around Skukuza which is over 10 000 ha in extent which is so totally infested with prickly pear that very little mammal life exists there ?
KNP is sacred. I am opposed to the modernisation of Kruger and from the depths of my soul long for the Kruger of yesteryear! 1000+km on foot in KNP incl 56 wild trails.200+ nights in the wildernessndloti-indigenous name for serval.

User avatar
Mauxie
Posts: 153
Joined: Sun Nov 09, 2008 11:19 am
Location: KZN South Coast-Just too far from Kruger

Orpen Dam.

Unread postby Mauxie » Sun May 23, 2010 8:58 am

This is ORPEN DAM lookout ....

Image

and the dam itself.

Image

This one is of the same dam but was taken in September 2008.

Image
KRUGER, my happy place!
+++++++++++++++++++++++++++++++++++++++
BIYAMITI 1st & 2nd OCTOBER
SKUKUZA 3rd & 4th
OLIFANTS 5th
SATARA 6th , 7th & 8th
LOWER SABIE 9th , 10th & 11th
BERG EN DAL 12th

User avatar
Thunderbird7
Posts: 51
Joined: Wed Oct 01, 2008 12:41 pm
Location: In a Cornish Smugglers cottage - or KNP

Orpen Dam

Unread postby Thunderbird7 » Fri Oct 29, 2010 10:43 am

Just curious to know when and how Orpen Dam was emptied of the water hyacinth/cabbage stuff?

All previous visits including the end of August, I have seen it totally green but this week it is just 'pure' (to a hippo) water!

Was it cleared by rangers or did the natural control finally work - if so, it seems amazingly quick!

User avatar
Imberbe
Distinguished Virtual Ranger
Distinguished Virtual Ranger
Posts: 14488
Joined: Wed Aug 31, 2005 12:28 am
Location: Pretoria, RSA

Re: Orpen Dam

Unread postby Imberbe » Fri Oct 29, 2010 11:10 am

They are under biological control, as it is impossible to physically remove such plants completely by physical means. Also take in to account that it has been winter which would naturally lessen their numbers.

But I don't think the problem has been solved completely as yet.
Imberbe = Combretum imberbe = Leadwood = Hardekool = The spirit of the Wildernis!

Want to know more about the SANParks Honorary Rangers? Visit www.sanparksvolunteers.org


One positive deed is worth more than a thousand critical words.

User avatar
Thunderbird7
Posts: 51
Joined: Wed Oct 01, 2008 12:41 pm
Location: In a Cornish Smugglers cottage - or KNP

Re: Orpen Dam

Unread postby Thunderbird7 » Fri Oct 29, 2010 3:00 pm

Thanks. The sign has been up for ages talking about the biological control but I was amazed how clear it is now.

User avatar
Riaanf31
Posts: 293
Joined: Sat Jan 02, 2010 4:36 pm
Location: London, but from Blaauwberg

Re: Orpen Dam

Unread postby Riaanf31 » Sun Nov 07, 2010 11:25 am

I've seen the sign there since my first visit to Orpen Dam in 2006.One major difference to all previous visits was the very obvious hippo pod in attendance. They were definately there in previous years. Might they be the reason for the turnaround. I've heard muted mention of there influence. If they are the major influence it would be interesting to hear whether they made there own way to Orpen Dam or were relocated to there.

Any comments from Sanparks?
To see a sunrise in KNP is to see magic.

Skukuza 18-20 April
Lower Sabie 21-24 April
Satara 25-29 April


Return to “KNP Camps & Roads”