Kerber Creek Restoration Project

Download Kerber Creek Restoration Project

Post on 14-Feb-2016

39 views

Category:

Documents

0 download

Embed Size (px)

DESCRIPTION

Kerber Creek Restoration Project. Case study employing statistical techniques to analyze effects of restoration activities, Saguache, CO. - PowerPoint PPT Presentation

TRANSCRIPT

<p>PowerPoint Presentation</p> <p>By: Trevor Klein (OSM/VISTA, Kerber Creek Restoration Project); Laura Archuleta (Environmental Contaminants Specialist, U.S. Fish &amp; Wildlife Service), Jason Willis (Mine Restoration Field Coordinator, Trout Unlimited), Negussie Tedela, Ph.D. (Hydrologist, Bureau of Land Management), Brian Sanchez, Ph.D. (Environmental Contaminants Specialist, U.S. Fish &amp; Wildlife Service)Case study employing statistical techniques to analyze effects of restoration activities, Saguache, COKerber Creek Restoration Project</p> <p>Introduction: Site History &amp; Study Objectives</p> <p>Methods: Site Description &amp; Study Design</p> <p>Results: Presentation of Data</p> <p>Discussion: Results &amp; Study Errors</p> <p>Conclusions</p> <p>Presentation Overview2Site Location</p> <p>Northernmost end of Saguache County, CO in the northern San Luis Valley</p> <p>Tributary to San Luis Creek in the Rio Grande Closed Basin</p> <p>Kerber Creek watershed is approximately 260 km2</p> <p>Includes private and BLM-owned rangeland and Rio Grande National Forest</p> <p>31880s 1970s (largely ceased by 1930s)Dozens of silver, lead, zinc, copper mines (largest: Rawley 12)Tailings originally collected and consolidated in streams and behind damsDams destroyed by flood events that carried tailings downstream and deposited them along the stream bank (mid-20th century)</p> <p>Bonanza Mining District: A History</p> <p>Restoration Efforts, I1991: USFS &amp; CDPHE investigate for Superfund designation1994: Bonanza Group (ASARCO, Inc., USFS, BLM, Local Landowners) approved to pursue Voluntary Cleanup</p> <p>1994-1999: Restoration projects implemented (upper watershed)2002: ASARCO, Inc. declares bankruptcy, halting restoration projects</p> <p>Rawley 12, pre-1996</p> <p>Rawley 12, 2012</p> <p>Squirrel Creek, pre-1992</p> <p>Squirrel Creek, 2012Restoration Efforts, IIKerber Creek Restoration ProjectMission: To sustain the health of the Kerber Creek watershed through collaborative restoration projects and community education</p> <p>MethodsPhytostabilization: In-situ treatment of mine waste deposits</p> <p>Stream Bank Stabilization: Installation of in-stream rock structures, re-gradation of stream banks</p> <p>Restoration Project ObjectivesImprove water quality</p> <p>Increase vegetation cover</p> <p>Increase fish density</p> <p>Increase macroinvertebrate density</p> <p>Reduce width/depth ratio</p> <p>Increase sinuosityCase Study: Problem and ObjectivesProblemObjectivesSystematic, rigorous data analyses rarely conducted for restoration projects</p> <p>Needs Comprehensive understanding of project results using easily monitored/derived variablesFurther knowledge of stream restoration processesEvaluate effects of extent of phytostabilization &amp; time on sinuosity</p> <p>Identify functional relationship between extent of phytostabilization &amp; sinuosity</p> <p>Assess validity &amp; feasibility of statistical techniques employed7</p> <p>Introduction: Site History &amp; Study Objectives</p> <p>Methods: Site Description &amp; Study Design</p> <p>Results: Presentation of Data</p> <p>Discussion: Results &amp; Study Errors</p> <p>Conclusions</p> <p>Presentation Overview8Geology: Dominated by tertiary igneous rock (latite)</p> <p>Precipitation: Low elevation, 25.4 cm; High elevation, 76.2 cm</p> <p>EcologyVegetation: grasses, willows, sedgesFishery: brook trout, some brown trout &amp; longnose dace</p> <p>HydrologyAvg. high flow: 60 cfsAvg. base flow: 4 cfs100-yr flood: 464 cfs</p> <p>GeomorphologyAvg. bankfull width: 4.3 4.9 mAvg. bankfull depth: &lt; 0.3 mAvg. gradient: 3%Medium-to-large cobble substrateSite Description</p> <p>Measuring Variables, I: Sinuosity</p> <p>Measuring Variables, II: Extent of Phytostabilization</p> <p>Used to investigate Objective 1</p> <p>Repeated measures analysis of varianceTime: Effect of natural channel evolutionIndependent Variable: Phytostabilization index treatment levels</p> <p>Interaction Term: Time BY Phytostabilization indexDependent Variable: Sinuosity</p> <p>Statistical Analysis, I: ANOVA</p> <p>12Statistical Analysis, II: Linear RegressionNote differences in graphs of Cooks D statistic vs. observation, studentized residual vs. leverage, sinuosity vs. predicted value, and measures of normalityRegression Diagnostics With and Without Outlier</p> <p>Introduction: Site History &amp; Study Objectives</p> <p>Methods: Site Description &amp; Study Design</p> <p>Results: Presentation of Data</p> <p>Discussion: Results &amp; Study Errors</p> <p>Conclusions</p> <p>Presentation Overview15Results, I: ANOVANo statistically significant differences; all null hypotheses could not be rejected</p> <p>Regression coefficient not significant</p> <p>Adjusted correlation coefficient = 0.357</p> <p>No final regression model</p> <p>Results, II: Linear Regression</p> <p>Phytostabilization Index (unitless)Sinuosity (unitless)</p> <p>Introduction: Site History &amp; Study Objectives</p> <p>Methods: Site Description &amp; Study Design</p> <p>Results: Presentation of Data</p> <p>Discussion: Results &amp; Study Errors</p> <p>Conclusions</p> <p>Presentation Overview18Discussion, I: ANOVA19Discussion, II: Linear Regression20Discussion, III: Validity &amp; Feasibility of the Study21Variable time periods since completion of restoration at each site</p> <p>Remote sensing-induced errors at KC08Discussion, IV: Other Considerations</p> <p>Introduction: Site History &amp; Study Objectives</p> <p>Methods: Site Description &amp; Study Design</p> <p>Results: Presentation of Data</p> <p>Discussion: Results &amp; Study Errors</p> <p>Conclusions</p> <p>Presentation Overview23Findings generally inconclusiveFurther, more rigorous data collection requiredNeed to develop more accurate, quantitative measures of extent of restorationNeed to identify appropriate statistical techniquesConclusions</p> <p>Squirrel Creek, 1990s</p> <p>Squirrel Creek, 2013</p> <p>Thanks!Trevor Klein, OSM/VISTA CoordinatorE-mail: trevorik276@gmail.comPhone: 757-286-2579</p>

Recommended

View more >