How do you fix a leaking pipe?
Damage to wetlands high in Lesotho's Maluti mountains has impacts on the health of the whole of the Orange-Senqu river system.
Near the banks of the Orange River, farm manager Le Roux Viljoen sends off an SMS to a weather station and receives an almost instantaneous response telling him the temperature, wind direction and estimated evaporation index.
Much of the internationally-recognised wetland surrounding the Orange River mouth has lost its rich green colour. Situated close to long-standing diamond mining operations, the river's mouth has been treated with environmental disregard for decades.
In the steep valleys of Lesotho's Maluti mountains, women carry yellow plastic buckets of water across fields of dark-brown earth; a group of men form a human chain to pass rocks between them to build a small dam wall across a mountain stream; clothes are being washed in rivers; and men draped in blankets ride donkeys or horses along the roadside.
The Orange-Senqu River has a one million square kilometre basin that covers Lesotho, South Africa, Botswana and Namibia. The water it provides is crucial to industry in South Africa, but is also relied on by farmers and domestic users.
For Katriena Anthony, being four months pregnant comes with hazards particular to her living conditions.
It's early spring in the fertile Breede River farming region, with the fruit orchards a blur of pink blossoms and the first green shoots starting to sprout in the vineyards, but for household gardener Ishmael Shiki it's been a bad start to the growing season.
"When my belly is crying I must fill it. I can sit on the side of the road and beg for bread, but there is the bread right there," says Hahn Goliath, a fisherman in the small village of Doring Bay on South Africa's West Coast, as he points furiously at the Atlantic Ocean.