A5035709830- Hydrology and Sediment Transport Processes
- Remote Sensing and LiDAR Applications
- Cryospheric studies and observations
- Landslides and related hazards
- Fire effects on ecosystems
- 3D Surveying and Cultural Heritage
- Soil erosion and sediment transport
- Groundwater and Isotope Geochemistry
- Water Quality and Resources Studies
- Rangeland and Wildlife Management
- Groundwater flow and contamination studies
- Hydrology and Watershed Management Studies
- Fish Ecology and Management Studies
- Colorectal Cancer Screening and Detection
- Archaeology and Natural History
- Underwater Acoustics Research
- Atmospheric and Environmental Gas Dynamics
- Underwater Vehicles and Communication Systems
- Geophysics and Gravity Measurements
- Seismic Imaging and Inversion Techniques
- Winter Sports Injuries and Performance
- Meteorological Phenomena and Simulations
- Hydrological Forecasting Using AI
- Structural Health Monitoring Techniques
- Offshore Engineering and Technologies
United States Geological Survey
2010-2024
California State University System
2019
Entertainment Industries Council
2016
St. Joseph’s Candler Hospital
2014
United States Department of the Interior
2012
The Central Valley of California is one the most prolific agricultural regions in world. Agriculture reliant on conjunctive use surface-water and groundwater. lack available land-use changes have led to pumping-induced groundwater-level storage declines, land subsidence, streamflow environment, degradation water quality. As a result, part, Sustainable Groundwater Management Act (SGMA) was developed. An examination components SGMA contextualizing regional model applications within framework...
We present quantitative analyses of recent large rock falls in Yosemite Valley, California, using integrated high-resolution imaging techniques. Rock commonly occur from the glacially sculpted granitic walls modifying this iconic landscape but also posing significant potential hazards and risks. Two occurred cliff beneath Glacier Point eastern Valley on 7 8 October 2008, causing minor injuries damaging structures a developed area. used combination gigapixel photography, airborne laser...
ABSTRACT A fundamental question in arid land management centers on understanding the long‐term effects of fire desert ecosystems. To assess surface topography, soil roughness, and vegetation, we used terrestrial (ground‐based) LiDAR to quantify differences between burned unburned surfaces by creating a series high‐resolution vegetation structure bare‐earth models for six sample plots Grand Canyon‐Parashant National Monument, Arizona. We find that 11 years following prescribed burns, mound...
First posted July 28, 2016 For additional information, contact: Director, California Water Science Center U.S. Geological Survey 6000 J Street, Placer Hall Sacramento, 95819http://ca.water.usgs.gov High-resolution ground-based light detection and ranging (lidar), also known as terrestrial laser scanning, was used to quantify the volume of mercury-contaminated sediment eroded from a stream cutbank at Stocking Flat along Deer Creek in Sierra Nevada foothills, about 3 kilometers west City,...
A full scale field seepage test was conducted on a north-south trending levee segment of now bypassed old meander belt Twitchell Island, California, to understand the effects live and decaying root systems slope stability. The in May 2012 centered trench with two segments: shorter control longer segment. complete length area measured 40.4 meters (m) near centerline mature trees located waterside landside flanks. instrumented piezometers tensiometers measure positive negative porewater...
First posted January 26, 2021 For additional information, contact: Director, California Water Science CenterU.S. Geological Survey6000 J Street, Placer HallSacramento, 95819 This river corridor assessment documents sediment mobility and response to flood disturbance along a 140-kilometer segment of the main-stem Klamath River below Iron Gate Dam, California. Field remote sensing methods were used assess fundamental indicators active transport combination natural runoff events reservoir...
First posted October 24, 2019 For additional information, contact: Director,California Water Science CenterU.S. Geological Survey6000 J Street, Placer HallSacramento, California 95819 High-resolution, terrestrial laser scanning, also known as ground-based lidar (light detection and ranging), was used to quantify the volume of mercury-contaminated sediment eroded from an outcrop historical placer-mining debris at confluence Humbug Creek South Yuba River in Sierra Nevada foothills, about 17...
Many existing water supplies in northeastern Kansas are proving inadequate to meet current and expanded future needs. One of the methods by which use highly variable streamflow area can be evaluated is with aid multiyear low-flow frequency information. Using data form 19 streamflow-gaging stations study area, maps were developed from mean annual discharge discharges for 2- 50-year recurrence interval durations 12,24, 36, 48, 60 months obtained rural ungaged sites that have drainage areas...
First posted February 10, 2022 For additional information, contact: Director,California Water Science CenterU.S. Geological Survey6000 J Street, Placer HallSacramento, California 95819 management in the Santa Ana River watershed San Bernardino and Riverside Counties southern (fig. A1) is complex with various water purveyors navigating geographic, geologic, hydrologic, political challenges to provide a reliable supply stakeholders. As population has increased throughout California, so demand...
Abstract This study assessed the referral and completion rates of colorectal cancer screening with fecal immunochemical test (FIT) in a primary care medical home serving an underserved population. The Good Samaritan Clinic (Clinic) provides to over 600 uninsured clients annually is staffed by volunteer health providers (Providers). All have income at or below 200 % Federal Poverty Line; 63.8 are Latino Hispanic, 22.3 non-Hispanic Caucasians, 10.1 African American. Acute client for...
We used ground-based Tripod LiDAR (T-LiDAR) to assess the stability of two engineered structures: a bridge spanning San Andreas fault following M6.0 Parkfield earthquake in Central California and newly built coastal breakwater located at Kaumālapa`u Harbor Lana'i, Hawaii. In 10 weeks earthquake, we found that surface under shifted 7.1 cm with an additional 2.6 motion subsequent 13 weeks, which deflected bridge's northern I-beam support 4.3 2.1 respectively; integrity remained intact. T-LiDAR...
First posted December 31, 2019 For additional information, contact: Director, California Water Science CenterU.S. Geological Survey6000 J Street, Placer HallSacramento, 95819 The abandoned hydraulic mine pit at Malakoff Diggins near Grass Valley, California, can produce large volumes of eroded sediment transportable by storm runoff. Sediment-laden water discharged from the is a major source heavy metals to Humbug Creek and South Yuba River. To develop comprehensive budget for identify...