Which of the following hydrologic functions places a value in each cell that is the area uphill that drains into that cell?

Which of the following hydrologic functions places a value in each cell that is the area uphill that drains into that cell?

flow accumulation function
The flow accumulation function places a value in each cell that is the area uphill that drains to that cell. Watersheds may be identified once a flow direction surface has been determined.

What is stream network?

Stream networks can be delineated from a digital elevation model (DEM) using the output from the Flow Accumulation tool. Flow accumulation in its simplest form is the number of upslope cells that flow into each cell.

What is stream to feature in Arcgis?

The algorithm used by the Stream to Feature tool is designed primarily for vectorization of stream networks or any other raster representing a raster linear network for which directionality is known. The tool is optimized to use a direction raster to aid in vectorizing intersecting and adjacent cells.

Where does water flow?

Watersheds and rivers In practical terms, water generally seeks to flow to the oceans, which are at sea level. So, no matter where on Earth water is, it tries to flow downhill. Because the Earth is not a very level place, water ends up occupying the valleys and depressions in the landscape as rivers and lakes.

How are the results of flow accumulation used?

The results of Flow Accumulation can be used to create a stream network by applying a threshold value to select cells with a high accumulated flow. For example, the procedure to create a raster where the value 1 represents the stream network on a background of NoData could use one of the following:

When to use a high flow accumulation cell?

Cells with a high flow accumulation are areas of concentrated flow and may be used to identify stream channels. This is discussed in Identifying stream networks. Cells with a flow accumulation of 0 are local topographic highs and may be used to identify ridges.

How are hydrologists used to study streamflow?

Hydrologists study streamflows with hydrographs USGS uses a hydrograph to study streamflow in rivers. A hydrograph is a chart showing, most often, river stage (height of the water above an arbitrary altitude) and streamflow (amount of water, usually in cubic feet per second).

What does streamflow mean in the water cycle?

Unless the river flows into a closed lake, a rare occurrence, or is diverted for humans’ uses, a common occurrence, they empty into the oceans, thus fulfilling their water-cycle duties. The U.S. Geological Survey (USGS) uses the term “streamflow” to refer to the amount of water flowing in a river.