Bathymetric and Sediment Survey of Centralia City Lake, Nemaha County, Kansas

Transcription

1 Bathymetric and Sediment Survey of Centralia City Lake, Nemaha County, Kansas Kansas Biological Survey Applied Science and Technology for Reservoir Assessment (ASTRA) Program Report (December 2010)

2 This work was funded by the Kansas Water Office through the State Water Plan Fund in support of the Reservoir Sustainability Initiative.

3 SUMMARY Summary Data: Bathymetric Survey: Reservoir Statistics: Elevation Benchmark (if applicable) Sediment Survey:

4 TABLE OF CONTENTS SUMMARY TABLE OF CONTENTS LIST OF FIGURES LIST OF TABLES LAKE HISTORY AND PERTINENT INFORMATION BATHYMETRIC SURVEYING PROCEDURE BATHYMETRIC SURVEY RESULTS SEDIMENT SAMPLING ii

5 LIST OF FIGURES iii

6 LIST OF TABLES iv

7 LAKE HISTORY AND PERTINENT INFORMATION Figure 1. Centralia City Lake, Nemaha County, Kansas.

8 Nemaha County, Kansas Bern Sabetha Oneida Seneca Centralia Centralia Lake Corning Goff Wetmore Ü Miles Figure 2. Location of Centralia Lake in Nemaha County, Kansas.

9 Reservoir Bathymetric (Depth) Surveying Procedures Pre-survey preparation: Geospatial reference data: Survey procedures: Calibration (Temperature and ball check): On-lake survey procedures:

10 Establishment Of Lake Level On Survey Dates: Centralia City Lake:

11 Location of Lake Elevation Benchmark:

12 USGS Home Contact USGS Search USGS National Water Information System: Web Interface USGS Water Resources Data Category: Geographic Area: News - updated November 2010 USGS CENTRALIA LK NR CENTRALIA, KS Available data for this site Lake Site DESCRIPTION: Latitude 39 41'46", Longitude 96 08'55" NAD83 Nemaha County, Kansas, Hydrologic Unit Drainage area: square miles Datum of gage: 1, feet above sea level NAVD88. AVAILABLE DATA: Data Type Begin Date End Date Count Real-time -- Previous 120 days -- OPERATION: Record for this site is maintained by the USGS Kansas Water Science Center questions about this site to Kansas Water Science Center Water-Data Inquiries Questions about sites/data? Feedback on this web site Automated retrievals Help Data Tips Explanation of terms Subscribe for system changes News Accessibility FOIA Privacy Policies and Notices U.S. Department of the Interior U.S. Geological Survey Title: ** USGS CENTRALIA LK NR CENTRALIA, KS URL: Page Contact Information: Kansas Water Data Support Team Page Last Modified: :07:38 EST vaww01

13 Ü Miles Figure 4. Bathymetric survey lines for Centralia City Lake

14 Post-processing (Visual Bottom Typer) The BioSonics, Inc. bottom tracker is an end_up" algorithm, in that it begins searching for the bottom echo portion of a ping from the last sample toward the first sample. The bottom tracker tracks the bottom echo by isolating the region(s) where the data exceeds a peak threshold for N consecutive samples, then drops below a surface threshold for M samples. Once a bottom echo has been identified, a bottom sampling window is used to find the next echo. The bottom echo is first isolated by user_defined threshold values that indicate (1) the lowest energy to include in the bottom echo (bottom detection threshold) and (2) the lowest energy to start looking for a bottom peak (peak threshold). The bottom detection threshold allows the user to filter out noise caused by a low data acquisition threshold. The peak threshold prevents the algorithm from identifying the small energy echoes (due to fish, sediment or plant life) as a bottom echo. Post-processing (Excel)

15 NOT Post-processing (ArcGIS):

16 Ü Depth in Feet ft Contours Miles Figure 5. Water depth based on December 14, 2009 bathymetric surveys for Centralia City Lake. Depths are based on a pool elevation of ft.

17 Table 1 Cumulative area in acres by tenth foot elevation increments Elevation (ft NGVD)

18 Table 2 Cumulative volume in acre-feet by tenth foot elevation increments Elevation (ft NGVD)

19 Cumulative Area (acres) Elevation (feet) Cumulative Volume (acre-feet) Elevation (feet)

20 SEDIMENT SAMPLING PROCEDURES Sediment samples were collected from three sites within the reservoir using a Wildco drop-corer (Wildlife Supply Company, Buffalo, NY). One sample is taken near the dam; a second at mid-lake; and a third in the upper end/transitional area. Sampling was performed on the same day as the bathymetric survey, following completion of the survey. As the drop-corer samples only the upper sediment, the entire sample in each case was collected and sealed in a sampling container. The samples were then shipped to the Kansas State University Soil Testing Laboratory (Manhattan, KS), for texture analysis. SEDIMENT SAMPLING RESULTS: Sampling sites were distributed across the length of the reservoir (Figure 8). Silt percentages were highest at the two inflow ends (CE-3, 66% and CE-7, 56%), decreasing to 3% at the dam end (CE-1) (Table 3; Figure 9; Figure 10). Table 3 Centralia City Lake Sediment Sampling Site Data CODE UTMX UTMY %Sand % Silt % Clay CE CE CE CE CE CE CE Coordinates are Universal Transverse Mercator (UTM), NAD83, Zone 14 North 14

21 Ü!. CE-5!. CE-1!. CE-8!. CE-2!. CE-3!. CE-4!. CE-6!. CE-7 Miles Figure 8. Location of sediment samples in Centralia City Lake

22 Centralia Reservoir 2010 Sediment Particle Size Analysis Sample Site

23 Ü CE-1! CE-5! CE-8! CE-2! CE-3 CE-4!! CE-6! CE-7! Particle Size Distribution Miles Sand Silt Clay Figure 10. Particle size distribution of sediment samples in Centralia City Lake Note: No particle size analysis was conducted for CE-8