Reading the Delta in Real Time
The Okavango Delta is a living system. Each year it breathes — filling with floodwaters born from rains that fell months earlier in the Angolan highlands, over a 2000 thousand kilometres to the north, then slowly drying through the season that follows. This river system is further fed by regional rainfall in Botswana. Where the water moves, the wildlife follows. Understanding this highly complex hydrological system requires an on ground presence and a deep knowledge of the Okavango that we have built up over decades. With a background in ecosystems conservation and monitoring, reading that rhythm is what we do, and it is what lets us place you in the right part of the Delta at the right time. Here we present a few tools to help you assess and visualize the Okavango Delta Floods in real time.
Live Okavango Flood Maps
The map above is live. It draws on satellite imagery from the European Space Agency’s Copernicus programme, refreshing automatically with each new pass over the Delta. However, standard satellite imagery does not give a clear idea of where the Okavango floods currently are and what it is they are doing. Regional rains enhance vegetation covering floods, and cloud cover can obscure the complete picture. As a result, we use further tools.
The infrared flood map above uses Synthetic Aperture Radar (SAR) imagery from the ESA’s Sentinel-1 satellites. Rather than capturing reflected sunlight, SAR satellites emit pulses of microwave energy and measure what bounces back — meaning they can penetrate cloud cover and work in complete darkness. Open water absorbs most of the radar signal and returns very little energy, while flooded vegetation and dry land each scatter it differently, producing the map’s distinctive colour signature.
That said, the layer is not perfectly accurate. Wind-roughened water scatters radar energy similarly to dry land, and shallow flooding beneath dense papyrus can be hidden from the radar entirely.
The True Flood Extents
The True Flood Extents map above is built on the peer-reviewed methodology developed by Piotr Wolski, Mike Murray-Hudson, Kgalalelo Thito, and Lin Cassidy, published in Keeping it simple: Monitoring flood extent in large data-poor wetlands using MODIS SWIR data (2017). Rather than interpreting raw satellite imagery directly, their approach uses MODIS shortwave infrared (SWIR) data — a spectral band particularly effective at distinguishing open water and saturated soils from dry land — cross-validated against extensive field observations and historical records from the Delta. The model is tuned specifically to the Okavango’s unique hydrology, making it considerably more reliable than the SAR infrared layer: less susceptible to wind interference, better able to detect flooding beneath papyrus and reed beds, and grounded in decades of on-the-ground data. Where the infrared map gives a useful real-time approximation, the Wolski et al. model gives the closest thing we have to a true picture of where the flood actually is.
Okavango Lodges and the Floods
We’ve pinned a selection of Okavango lodges on the map so you can see the live water situation at each camp. Toggle between the True Colour, Infrared, and True Flood Extents tabs to get a real-time picture of flooding around each lodge — useful for understanding what the Delta looks like on the ground right now, and how conditions vary from one camp to another.
Monitoring Water Levels, Streamflow, and Water Quality
Satellite imagery and analysis only paints half of the picture. We also actively monitor water levels and streamflow at key points across the Okavango system. Tracking these figures tells us how much water is entering the system, how fast it is moving, where the flood front is likely to reach and when, and what the quality of the water is coming in (we closely monitor for contamination that could harm the ecosystem downstream) — giving us an accurate, up-to-date picture of conditions on the ground.
The above graph shows the current water levels at Divindu and is supplied by the National Geographic’s Wild Bird Trust. This initiative forms part of National Geographic’s Okavango Wilderness Project and they actively monitors water levels at 16 key points throughout the Angola highlands which supply water into the Okavango, the Cuito and Cubango Rivers which flow into the Okavango, the upper stretches of the Okavango River, the Okavango panhandle, and the Okavango Delta itself.
We actively monitor all of their live feeds, but the most useful data is generally Divundu as its position, just before the entrance to the panhandle (in Namibia), allows us to assess and gauge the amount of flood waters coming into the Okavango Delta river system at any given time. While water levels are incredibly important, we also need to consider water streamflow in order to build the fuller picture.
This graph tracks streamflow — the volume of water moving past a fixed point per second, measured in cubic metres per second (m³/s) — at two key monitoring stations upstream of the Okavango Delta. Rundu sits on the Cubango River in Namibia and is the first major gauge point after the river descends from the Angolan highlands, giving an early indication of how much water is entering the system following the rainy season. Mukwe sits further downstream, after the Cubango has been joined by the Cuito River flowing from eastern Angola — the combined flow at this point gives a more complete picture of the total volume of water heading toward Botswana. Because water takes weeks to travel from these stations to the Delta, readings at Rundu and Mukwe serve as an early warning of what flood conditions are coming. Data is sourced from the Namibia Flood and Drought Monitor, a hydrological modelling system operated by the University of Southampton in partnership with regional water authorities, and updated daily, with the dashed lines showing a short-term forecast and the shaded band indicating the range of uncertainty around that projection. Understanding these streamflows gives us an understanding of the charge of flood waters coming into the Okavango Delta river system at any given time.
Through the Department of Water Affairs in Botswana, along with the Wild Bird Trust, we also closely monitor the quality of the water entering the Okavango Delta. In the past we have been concerned with and fought against upstream oil and gas exploration in Namibia and have published an academic paper on how contamination from oil exploration would likely enter the Okavango Delta. While oil exploration in the region has slowed down, we are increasingly concerned about the prospects of rare-earth mining along the pan handle – an initiative being publicised by a Canadian Mining Group called Tsodilo Resources. We are actively monitoring this project and are working on raising awareness of the risks associated with allowing this group to operate in the region.
However, the greatest challenge we face in terms of water quality – as well as flow, currently comes from an explosion of agricultural projects along both the Cuito and Cubango Rivers in Angola. Data obtained from the monitoring stations in Dirico and Divundu have growing shown spikes in water pH levels – the result of contaminant runoff from farms along the river – flowing into the Delta. While these elevated pH levels are not currently an immediate threat to the integrity of the ecosystem, we continue to monitor them actively.
The above map shows all hydrological stations we monitor though the Wild Bird Trust, the Department of Water and Affairs Botswana, and the Namibia Flood and Drought Monitor.
Why Water Knowledge Changes Everything
In a system this dynamic, generic advice doesn’t hold. A camp perfectly positioned in May can be half-cut-off by July; a floodplain that is empty one month teems with life the next. Booking through specialists who track the Delta in real time — across hydrology, spatial mapping and wildlife movement — is the surest way to be in the right place when it matters. If you’d like to talk through where the water and the wildlife are heading this season, we’re always happy to help.
The Okavango Delta is one of the most dynamic ecosystems on earth — a landscape that transforms completely depending on where the flood is, how high it has risen, and how far it has spread. Through active hydrological monitoring, satellite imagery, and a permanent presence on the ground, we hold a depth of current knowledge about Delta conditions that simply isn’t available elsewhere. That means when you come to us to plan a safari, we’re not guessing at what the Delta will look like — we know what it looks like right now, we understand where it’s heading, and we can match your dates, your expectations, and your chosen camps to the precise conditions that will make your experience exceptional.
