2007 Annual Report 1a.Objectives (from AD-416) To elucidate interactive effects of climate, land use, and management in agricultural watersheds in order to quantify conservation impacts, deliver more effective conservation outreach and education programs, and contribute to improved sustainability of water resources. 1b.Approach (from AD-416) Integrated monitoring and simulation within a watershed context includes analysis of historic climate cycles, development of historic time series of land use and management, quantification of land management on soil properties, monitoring water quantity and quality in groundwater and stream networks, and simulation of hydrologic processes using the Soil Water Assessment Tool (SWAT) and other simulation models. Monitoring sites are maintained under agreement with private land owners within the watershed, and research results are shared with diverse local, state, tribal, and federal organizations and agencies with an interest in water resources in Oklahoma. 3.Progress Report This report serves to document research conducted under a specific cooperative agreement between ARS and the Oklahoma State University. Additional details of research can be found in the report for the parent CRIS 6218-11130-003-00D, Integration of Climate Variability and Forecasts into Risk-Based Management Tools for Agricultural Production and Resources Conservation. Land use/ land cover maps are critical data used in the SWAT hydrologic model. Land use/ land cover maps help identify homogeneous land areas and corresponding descriptive parameters for hydrologic modeling. In 2005, personnel from the Grazinglands Research Laboratory (GRL) conducted field investigations to document (groundtruth) land cover at various locations within both the Little Washita River and Ft. Cobb Reservoir experimental watersheds. Satellite images at about the time of field investigations were acquired. Satellite imagery, field notes, photographs, and latitude / longitude coordinates of sampled sites were handed over to cooperators in the Department of Geography at Oklahoma State University (OSU). The OSU cooperators, in collaboration with scientists from GRL, developed a landuse map depicting conditions for the year 2005. The landuse map has been delivered to the GRL and a final report of the mapping methodology is being prepared. The ADODR monitored progress of the project through site visits, meetings, e-mails, and telephone conversations.