Graphic of Rivers with Tributaries - types of Dementia for American Indian Audience

This is what International Association for Indigenous Aging was looking for in their graphic design

We are creating a workbook for American Indian and Alaska Native people about dementia and Alzheimer's. We would like a simple single graphic of rivers with tributaries representing the types and percentage of dementia for an American Indian and Alaska Native Audience. We are looking for a conceptual interpretation that ties into a story about rivers later in the workbook.

Ultimately we have about a 5"x 5" space for the image on the page. It may be taller if needed but preferably not wider than 4-5". The size of the "tributaries" feeding into the main river/body of water should be scaled to the size/% of types of dementia.
Alzheimer's disease is most common and represents 60% of cases of dementia,
vascular dementia is about 5-10% of cases,
mixed dementia is about 10% of cases,
frontotemporal is 5-10% of less
Lewy body represents 5-10% of cases

You do NOT need to include the % but please include the name of each type of dementia above.
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