Rice field distance attributes

A data frame containing the results of the FlowWest analysis of flow distances to the nearest salmonid rearing stream. Intended to be joined to the fields dataset.

ff_distances

Format

An object of class tbl_df (inherits from tbl, data.frame) with 9628 rows and 11 columns.

Source

Skyler Lewis, Bethany Hackenjos, FlowWest, 2023.

Details

  • unique_id = the unique identifier of the rice field as defined in the original CNRA dataset

  • return_id = the return point from the returns dataset used in the distance calculation for this rice field, as determined based on watershed in which the field is located. For watersheds with a return_id of zero, fields are assumed to flow laterally into the nearest major stream rather than via the return point

  • ds_fbs_dist = for fields flowing into "Indirect" return points, this is the downstream flow distance from the return point to the nearest salmonid rearing stream, else zero

  • return_dis = linear distance from the centroid of the rice field to the return point (or laterally to the nearest salmonid rearing stream)

  • return_rec = rectangular grid distance from the centroid of the rice field to the return point (or laterally to the nearest salmonid rearing stream)

  • totdist_ft = total distance from the rice field to the nearest salmonid rearing stream, calculated via ds_fbs_dist + return_dis using linear distances

  • totrect_ft = total distance from the rice field to the nearest salmonid rearing stream, calculated via ds_fbs_dist + return_rec using rectangular grid distances

  • totdist_mi = totdist_ft converted to miles

  • totrect_mi = totrect_ft converted to miles

  • wet_dry = of the rice field as on theidentifier wet or dry side of the levee

Examples

head(ff_distances)
#> # A tibble: 6 × 11
#>   unique_id return_id ds_fbs_dist return_dis totdist_ft totdist_mi fbs_name     
#>   <chr>         <dbl>       <dbl>      <dbl>      <dbl>      <dbl> <chr>        
#> 1 1103539          49     261359.     41551.     302910       57.4 Lower-mid Sa…
#> 2 1102849          49     261359.     60092.     321452       60.9 Lower-mid Sa…
#> 3 1103353          49     261359.     69094.     330454       62.6 Lower-mid Sa…
#> 4 1103425          50     266763.     69577.     336340       63.7 Lower-mid Sa…
#> 5 1103546          50     266763.     21440.     288203       54.6 Lower-mid Sa…
#> 6 1103560          49     261359.     41578.     302937       57.4 Lower-mid Sa…
#> # ℹ 4 more variables: totrect_ft <dbl>, totrect_mi <dbl>, return_rec <dbl>,
#> #   wet_dry <chr>