Confluence fan of river Česma is formed by numerous streams rising on the slopes of Bilogora and Moslavačka mountain. The southern slopes gently descend Bilogora, rugged numerous streams and gullies, steep and deep. The slopes have a lot of resources, which in the dry part of the lost water.
The area around the river Česma up to a hundred years ago it was subject to flooding which is why it was marshy. Then the fountain and its tributaries channeled, levees were built for flood protection, and the soil is dried to obtain arable land as well as the fight against malaria. At the site of former wetlands now are ponds that are fed by water from the streams that flow into the fountain. These ponds are one of the last waterfowl refuge between the Drava and Sava.