 There are no rivers in the rest of the park, although there are fossil drainage channels in the main camp and Linkwasha areas, which form seasonal wetlands.In these areas without rivers, grassy pan depressions and pans have formed.Some of these pans, such as many of the pans in the Shumba area, fill with rainwater, while others, such as Ngweshla, Shakwanki and Nehimba, are fed by natural groundwater seeps.