1a. Objectives (from AD-416):
To quantify interactive effects of climate variability and land management on water availability and quality.
1b. Approach (from AD-416):
The ARS Grazinglands Research Laboratory and Oklahoma State University are engaged in the measurement and analysis of weather, climate, and soil data. The Oklahoma Mesonet is a joint effort of the Divison of Agriculture Sciences and Natural Resources at Oklahoma State University in conjunction with the College of Geosciences at the University of Oklahoma for the purpose of maintaining a statewide network of automatic weather stations. As part of the collaborative effort, the Oklahoma Mesonet will operate and maintain 35 instrumented weather stations on the Little Washita River and Fort Cobb Reservoir Experimental Watersheds (the ARS Micronet), provide quality control/quality assurance of the data, maintain a data archive, and distribute data to users. Long term assessments of climate patterns and hydrologic responses will be communicated to a variety of end users through the Oklahoma Mesonet website.
3. Progress Report:
Global climate change, decade-long and inter-annual climate variations, and changes in land use can have a profound impact on regional water resources and water quality, thereby affecting urban and industrial water supply, hydro-electric power generation, transportation, recreation, and ecosystem sustainability. Only through a comprehensive monitoring program and hydrologic analysis of large agricultural watersheds can one identify management opportunities that positively impact downstream water availability and quality. Under this subordinate project, precipitation, soil moisture, and soil temperature at 20 sites on the Little Washita River Experimental Watershed and 15 sites on the Fort Cobb Reservoir Watershed were measured, quality controlled, and archived in collaboration with Oklahoma State University and in conjunction with the Oklahoma Mesonet, a network of climate stations covering the State of Oklahoma. ARS reviewed monthly quality reports on the status of instruments and maintenance. An assessment was provided on instrumentation replacements or upgrades needed at the Micronet sites over the next year. The 5-minute data were subjected to additional in-house quality control measures. A few errors were observed in the data, which were not detectable using prior protocols. The 5-minute data were corrected and re-saved to the data archive. Daily data was also re-computed from the 5-minute data and made available to the public and research communities through two websites.