There isn't a specific, official term for the type of solution formed by creek water after heavy rain. However, we can describe it based on its characteristics:

* Turbid: The water will be cloudy and murky due to suspended sediment and debris.

* High in dissolved solids: Rainwater picks up minerals and organic matter as it flows over the land, leading to a higher concentration of dissolved solids in the creek.

* Varying pH: The pH can fluctuate depending on the types of soil and rocks the water flows over.

* Potential for pollutants: Runoff from urban areas or agricultural fields can introduce pollutants like fertilizers, pesticides, and heavy metals.

While it's not a single "type" of solution, the combination of these factors creates a dynamic and complex mixture in creek water after heavy rain.