陇东黄土高原中沟小流域土壤水分实测数据集(2018)

Soil Moisture Dataset of the Zhonggou River Basin in the Loess Plateau of Gansu Province

作者在陇东黄土高原中沟小流域内选取70年代中后期大面积种植的人工刺槐林与退耕后自然恢复的草坡植被,综合考虑不同坡度坡向刺槐林地及不同林龄与不同种植密度的刺槐林等因素,按照植被类型、林龄、立地特征等变化,设立了十个林地样地和三个草地样地,采用烘干法与时域反射仪法(TDR)对所有样地的土壤水分进行了测定。土壤水分测定管的最大埋深可达3m,土钻的最大测定深度达2m。2018年实现了对所有样地的完整观测,获取了生长季内土壤重量含水量和体积含水量的实测数据。该数据集包括:(1)样地基本信息表,包括观测样地的地理位置、地形、林龄、密度、胸径等主要林分结构数据;(2)2018年4–10月用土钻测得的13个样地0–120 cm土壤重量含水量数据;(3)2018年4–10月TDR测量的13个样地0–300 cm土壤体积含水量数据。数据集存储为.xlsx、.shp和.kmz格式,由9个数据文件组成,数据量为252 KB(压缩为2个文件,238 KB)。该数据集的部分分析研究成果已发表在《干旱区研究》2019年第36卷第5期。

Zhonggou River basin was chosen as a typical small watershed of Longdong Loess hilly-gully region of the Loess Plateau of China.The robinia pseudoacacia planted in the 1970 s and natural recovery grassland were selected as the research sites.Ten sample plots of forest land and three sample plots of grassland were set up according to the changes of vegetation type,forest age,and site characteristics.The soil moisture of all samples was measured by drying method and Time Domain Reflectometer(TDR).The maximum depth of soil moisture measurement pipe is 3 m,and the maximum depth of soil drill is 2 m.In 2018,the complete observation of all sample plots was achieved,and the measured data of soil mass moisture and volumetric moisture during the growing season were obtained.The dataset includes:(1)13 geographical location and topographic data of the observed plots,as well as the forest age,density,DBH,and other main stand structure data;(2)Measured data of soil mass water content and volumetric water content from April to October,2018.The dataset was archived in.xlsx,.shp,and.kmz data formats with data size of 252 KB in 9 data files(compressed to 238 KB in two data files).The research results related to the dataset were published in the Journal of Arid Zone Research(Vol.36,No.5,2019).