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2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 ~ 95 program and will provide GCMRC with information to formulate future projects, It is anticipated that these data will help focus assessment efforts on particular site types or areas that are prone to impacts. In addition, these data may suggest projects that investigate Isolated Occurrences (lOs) as they may Tepresent the last remains of site materials, or they may constitute the first exposures of buried sites or individual episodes of use and occupation within the river corridor. Collectively, lOs yield information about past adaptations and how people interacted with their cultural landscapes. Synthesis data will be available in FY 99. Other monitoring activities in this area should complement basic monitoring activities that are accomplished under the P A program. Areas of monitoring under the GCMRC program that are not covered by the P A program, include cultura1 resources that do not fit the narrower definitions of the PA program and work not being conducted under that program. Examples include traditional tribal assessments of ethnobotanical and other cultural resources (landforms, mineral resources, etc.) and stationary camera photographic monitoring related to flow stages and ramping rates in the Glen Canyon reach where high terraces with cultural deposits seem to be vulnerable to varying flow stages. Data currently being generated by the geomorphic and stage flow and deposition projects will be available early in FY 2000 and should help to refine and focus GCMRC projects. The synthesis of the monitoring data may also contribute to a review of the PA monitoring program and the ability to reduce the monitoring effort by identifying a subset of representative triggering site types that are characteristic of the broader suite of sites currently being monitored that will be utilized as threshold markers for potential erosion at similar sites within the Canyon 2) Develop data systems to assess risk of damage at critical threshold levels, and loss from varying flow regimes. The compilation of existing site data from the P A program and the GCMRC physical science program can be useful to predict resource risk factors from varying flow regimes, including inundation impacts and related depositional effects that may benefit resources, Flow regimes and deposition at various stages can be quantitatively modeled for previously unevaluated resources, such as traditional tribal resource locations. Model results can be mapped in combination with resource locations and other descriptive '. ;. ~ ' '" :.::,' ~I f~: ..;; .,. :.~ ;::~ , :~. I ~~:~ ;~l ::'~~ ~. ~ F:: " ~. '. ~; 'Ii .-;. ~ :,It ,.. it '.. ::1 'I I November S, 1998 Second Draft - Do Not Cite, Photocopy, or DistrIbute