adjustreservoirpolygon

adjust polygon of reservoir to reference surface water extent map

Define a spatial 'Area of Interest' (AOI) around a constructed dam using hydrology data.
Dams have environmental and social impacts, both positive and negative.
Current analyses of dams have no consistent way to specify at what spatial extent we should evaluate these impacts.
'damAOI' implements methods to adjust reservoir polygons to match satellite-observed surface water areas, plot upstream and downstream rivers using elevation data and accumulated river flow, and draw buffers clipped by river basins around reservoirs and relevant rivers.
This helps to consistently determine the areas which could be impacted by dam construction, facilitating comparative analysis and informed infrastructure investments.

Chris Littleboy

damAOI

Create an 'Area of Interest' Around a Constructed Dam for
Comparative Impact Evaluations

Isabel Jones

adjustreservoirpolygon function

<dl><dt>reservoir</dt>
<dd>An sf polygon, with an unstandardised raw reservoir</dd>
<dt>water_bodies</dt>
<dd>A rast, where 1 indicates water, NA otherwise</dd>
<dt>dem</dt>
<dd>A rast, showing elevation</dd>
<dt>poss_expand</dt>
<dd>A number, indicating the number of meters away from the raw reservoir the reservoir may expand to. Default is 20000 (20km).</dd>
<dt>wbjc</dt>
<dd>A number indicating a "water body join correction". This is a small buffer zone for the reservoir polygon to ensure that it is contiguous (important where there are small channels connecting different parts of the same water body). Default is 0 but it is necessary for some dams to include a small buffer, particularly if the reservoir has areas which are less wide than the resolution of the underlying DEM.</dd></dl>

Arguments

adjust polygon of reservoir to reference surface water extent map — adjustreservoirpolygon

<dl>

<dt>reservoir</dt>
<dd>An sf polygon, with an unstandardised raw reservoir</dd>


<dt>water_bodies</dt>
<dd>A rast, where 1 indicates water, NA otherwise</dd>


<dt>dem</dt>
<dd>A rast, showing elevation</dd>


<dt>poss_expand</dt>
<dd>A number, indicating the number of meters away from the raw reservoir the reservoir may expand to. Default is 20000 (20km).</dd>


<dt>wbjc</dt>
<dd>A number indicating a "water body join correction". This is a small buffer zone for the reservoir polygon to ensure that it is contiguous (important where there are small channels connecting different parts of the same water body). Default is 0 but it is necessary for some dams to include a small buffer, particularly if the reservoir has areas which are less wide than the resolution of the underlying DEM.</dd>

</dl>

adjustreservoirpolygon: adjust polygon of reservoir to reference surface water extent map

Description

Usage

Value

Arguments