Little Washita River Experimental Watershed, Oklahoma (Flow)

Over the past five decades, the United States Department of Agriculture-Agricultural Research Service (USDA-ARS) and the United States Geological Survey (USGS) have collected stream flow, reservoir, and groundwater data in the Fort Cobb Reservoir Experimental Watershed (FCREW) and Southern Great Plains Research Watershed (SGPRW), which includes the Little Washita River Experimental Watershed (LWREW) in central Oklahoma. The climate in these watersheds is subhumid, with average annual rainfall of 800 mm (1971-2000 average for Caddo County; Oklahoma Climatology Survey, 2005). The drainage area of the SGPRW is 2927 km2 and includes the LWREW. The LWREW covers an area of 610 km2 and consists of mixed agricultural land use, mainly pasture and rangeland that covers 68% of the total area. The topography is rolling with a maximum relief of 180 m and sandy to loamy soils. Of the 13 USGS stream gauges in the LWREW, two of them, ARS 522 and ARS 526, were initially managed by the USDA-ARS but decommissioned in 1985. Gauge ARS 522 was colocated with the USGS stream gauge ID 7327490, and data from this gauge were used when ARS 522 was discontinued. In 1992, the USGS installed the stream gauge ID 7327447 at the same location (Little Washita River near Cement, OK) where ARS 526 existed. For the stream gauges ID 522 and 526 installed by the ARS, stream stage data were obtained using a Hg manometer bubble gauge and a continuous stage recorder. Periodic stream discharge measurements were made during rain events and low-flow periods to define the relationship between flow discharge and stage. Discharge data by time increments were computed from the stage charts by the stage shift method (Corbett, 1943; Brakensiek et al., 1979). The directly measured data are the stage, which is then used to estimate discharge using stage-discharge relationships. All measurements made at USGS gaging stations are quality assured and quality controlled. The equipment used to make the measurements is securely housed and regularly checked for calibration and drift. Current meters are spin tested before use and checked after use if the measured value is deemed questionable. Resources in this dataset:Resource Title: GeoData catalog record. File Name: Web Page, url: https://geodata.nal.usda.gov/geonetwork/srv/eng/catalog.search#/metadata/WashitaFlow_jjm_2015-03-26_1409

在过去半个世纪中，美国农业部-农业研究服务局（USDA-ARS）和美国地质调查局（USGS）在福特科布水库实验流域（FCREW）和南部大平原研究流域（SGPRW）中收集了河流流量、水库和地下水位数据，该流域包括位于俄克拉荷马州中部的利特尔瓦希塔河实验流域（LWREW）。这些流域的气候为亚湿润气候，平均年降雨量为800毫米（以1971-2000年卡多县的平均值；参见2005年俄克拉荷马州气候调查）。SGPRW的排水面积为2927平方公里，包括LWREW。LWREW覆盖面积为610平方公里，土地利用类型以混合农业为主，其中牧场和放牧地占总面积的68%。地形以丘陵为主，最大高差为180米，土壤类型为沙质至壤土。在LWREW中的13个USGS河流流量计中，ARS 522和ARS 526最初由USDA-ARS管理，但于1985年停用。流量计ARS 522与USGS河流流量计ID 7327490并置，当ARS 522停用时，使用了该流量计的数据。1992年，USGS在ARS 526所在的位置（俄克拉荷马州塞门附近的利特尔瓦希塔河）安装了流量计ID 7327447。对于ARS安装的流量计ID 522和526，使用水银压力计气泡流量计和连续水位记录器获得了水位数据。在降雨事件和低流量期间进行周期性流量测量，以确定流量和水位之间的关系。通过水位变化法（Corbett, 1943；Brakensiek等，1979）从水位图表中计算出时间增量内的排放数据。直接测量的数据是水位，然后利用水位-流量关系估算排放量。所有在USGS流量站进行的测量都经过质量保证和质量控制。用于测量的设备被安全地存放，并定期检查校准和漂移。在使用前对流速仪进行旋转测试，如果测得值被认为可疑，则在使用后进行检查。本数据集包含的资源：资源标题：GeoData目录记录。文件名：网页，URL：https://geodata.nal.usda.gov/geonetwork/srv/eng/catalog.search#/metadata/WashitaFlow_jjm_2015-03-26_1409