English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Once the data collection effort was completed, data editing was necessary to remove erroneous data points and apply water-surface elevations. Bathymetric data can be affected by anything that happens to be in the water column below the depth transducer. HYPACK® software has a data editing module that allows the user to remove erroneous data points caused by submerged vegetation or timber, fish, bubbles (from waves or the motor), or rock/cobble on an otherwise smooth bottom. Submerged vegetation was present in many parts of the surveyed area, and sometimes in large patches. In some areas, part of the echosounder signal was able to penetrate through the vegetation so that some of the returns were actually from the lake bottom. In other areas, the vegetation was very thick, and the signal did not reach the bottom. In areas of thick vegetation, the edited data has gaps where the erroneous vegetation returns were removed. The boat-based data from the echosounder is produced at a high frequency (as many as 20 pulses per second). This results in very closely spaced data points when the boat travels at the slow speeds typically used during the survey. Individual data points commonly were less than 0.2 foot apart along the transect. This high frequency of data collection would be useful when traveling at higher speeds or in areas with a steep and rapidly changing bottom terrain. However, the bottom within the study area was generally very smooth, and the shallow depths commonly encountered required a relatively slow travel speed. This resulted in a very dense dataset with many redundant data points. The HYPACK® software allows the user to select a subset of the data, based on a desired distance between points or when the depth change between adjacent points exceeds a user-defined threshold. This capability was used on the boat-based data collected on the regular transects to provide a dataset of a more manageable size. The maps of water depth and bottom elevation described in the next section were developed from the edited subset of the original data.

Nearshore bathymetric mapping along a 7-mile reach of Lake Sharpe shoreline near Lower Brule, South Dakota, 2013