Appalachian stream length dynamics: shapefiles

Wet stream length and connectivity maps for 3 forested catchments (<75 ha) in each of 4 physiographic provinces of the Appalachian Highlands: the New England, Appalachian Plateau, Valley and Ridge, and Blue Ridge. Maps were developed for 12 headwater catchments under 7 different wetness conditions as represented by stream discharge and characterizing conditions between exceedance probabilities of <5% and >90% of the mean daily discharge. The dataset represents a map (shapefile) of the "wet" stream network on 7 different occasions for the 12 catchments. A “wet stream” location applies to visible surface water greater than 1 m in length at a GPS location. These data are described in detail and analyzed in: Jensen, C. K., McGuire, K. J., & Prince, P. S. (2017). Headwater stream length dynamics across four physiographic provinces of the Appalachian Highlands. Hydrological Processes, 31(19), 3350-3363.本数据集包含阿巴拉契亚高地（Appalachian Highlands）4个地貌省（physiographic province）内各3个面积小于75公顷的森林覆盖集水区（catchment）的湿润溪流长度与连通性地图，这4个地貌省分别为新英格兰、阿巴拉契亚高原、岭谷区与蓝岭。研究针对12个源头集水区（headwater catchment），基于7种以溪流流量（stream discharge）表征的不同湿润状态构建了上述地图，这些湿润状态覆盖了日平均流量超越概率（exceedance probability）小于5%至大于90%的区间。本数据集包含12个集水区在7个不同时刻的"湿润"溪流网络形状文件（shapefile）格式地图。"湿润溪流"点位指的是GPS定位处可见、长度大于1米的地表水。相关数据的详细描述与分析详见文献：Jensen C.K.、McGuire K.J.与Prince P.S.（2017）发表于《水文过程》（*Hydrological Processes*）第31卷第19期，页码3350-3363的论文《阿巴拉契亚高地4个地貌区的源头溪流长度动态》。