AGW02 Measurement of groundwater physical and chemical properties from wells in contrasting land uses near Kings Creek, Konza Prairie

Wells were drilled in two sites on Konza Prairie Biological Station in April, 1993 approximately 100 m from Kings Creek. The two sites are located in a grassland and an agricultural area. The grassland site (K01A) is an old field that was planted with brome sometime prior to 1976. It has not been grazed for 25 years and is burned in spring every 1-2 years. The agricultural site is currently under a mix of cultivation and restoration plots. Historically, it was cultivated from sometime between 1939 and 1950 to the present. It is approximately 1 km downstream in an area geologically similar to K01A. The soil at both sites is mapped as Reading silt loam (fine, mixed, mesic Typic Arguidolls). Samples are taken monthly by PVC bailer following removal of 2 times the well volume. Samples are analyzed with same methods as used for LTER stream water chemistry.

1993年4月，研究人员于距离金斯溪（Kings Creek）约100米的康扎草原生物站（Konza Prairie Biological Station）的两个点位钻取监测水井。两个点位分别设置于草原区域与农业区域：其中草原点位（K01A）为一块1976年之前便播种雀麦草（brome）的弃耕地，已有25年未遭受放牧干扰，且每1至2年春季会进行一次火烧处理；农业点位目前兼具耕作样地与生态修复样地，其耕作历史可追溯至1939年至1950年间的某个节点，且耕作状态持续至今。该农业点位位于草原点位下游约1公里处，区域地质条件与K01A点位基本一致。两处点位的土壤均被归类为雷丁粉壤土（Reading silt loam，细质混合型温性典型强发育湿软土（fine, mixed, mesic Typic Arguidolls））。研究人员每月采用PVC提水器（PVC bailer）采集水样，采样前需先抽取相当于井内容积2倍的水量以洗井；水样的分析方法与长期生态研究（LTER，Long-Term Ecological Research）河流水化学分析方法保持一致。