黑河综合遥感联合试验：大野口关滩森林站超级样地小型蒸渗仪蒸散发数据集

本数据来自大野口流域关滩森林站超级样地，该超级样地乔木植被为青海云杉纯林，样地大小为100m×100m。 针对该样地的观测数据主要有：地基激光雷达扫描数据、全站仪定位测量数据、差分GPS定位测量数据、测树调查数据、叶面积指数观测数据、冠层光谱测量数据、冠层的相机观测数据、土壤蒸散发数据、土壤冻结管观测数据、地表粗糙度数据、降雨截留数据、土壤水分测量数据、林木组分干湿重测量数据等。

该数据主要用自制的Lysimeter来观测青海云杉林林内的土壤蒸散发特征。 为流域蒸散发模型的发展提供基础数据，为遥感反演蒸散发提供地面验证数据。
观测时间：2008-06-01至2008-12-31日每天下午18:00，如果当天有降雨的话，会在降雨结束后观测一次。 利用观测前后的重量差值，然后结合水的密度和Lysimeter的直径（20cm）来计算土壤水分蒸发量。 若Lysimeter下的集雨器内有透过雨量，则要测量该透过雨量。 观测地点： 大野口关滩森林站森林水文试验样地。 观测内容：1）对照的大气降雨，有两个雨量筒同时观测， 布设在水文试验样地附近平缓的河滩上。 2）林内穿透降雨，在样地内共布设了20个雨量筒，布设的依据是雨量筒上方的冠层郁闭度。 3）每天18:00的Lysimeter重量。 4）Lysimeter下面集雨器的透过雨量。
观测仪器：1）标准20cm直径雨量筒量雨器。2）自制Lysimeter（直径20cm；共4个；土壤植被各不相同）。3）电子天平（精度0.1g），用于观测自制Lysimeter的重量变化。

This dataset is sourced from the permanent mega-plot of Guantan Forest Station in Dayekou Basin. The arbor vegetation in this mega-plot is a pure Picea crassifolia forest, with a plot size of 100 m × 100 m. The main observational datasets collected for this plot include: terrestrial LiDAR scanning data, total station positioning survey data, differential GPS positioning survey data, tree mensuration data, leaf area index (LAI) observations, canopy spectral measurement data, canopy camera imagery data, soil evapotranspiration data, soil frost tube observation data, surface roughness data, rainfall interception data, soil moisture measurement data, and dry/wet weight measurement data of tree components, among others.

This dataset primarily uses self-made lysimeters to observe soil evapotranspiration characteristics within the Picea crassifolia forest. It provides foundational data for the development of basin evapotranspiration models and ground validation data for remote sensing inversion of evapotranspiration.

Observation period: From June 1, 2008 to December 31, 2008, with daily observations conducted at 18:00. If rainfall occurs on a given day, an additional observation will be carried out immediately after the rainfall ends. Soil evapotranspiration is calculated using the weight difference before and after observations, combined with the density of water and the diameter (20 cm) of the lysimeter. If throughfall is collected in the rain collector beneath the lysimeter, this throughfall volume must be measured.

Observation site: Forest hydrology experimental plot of Guantan Forest Station in Dayekou Basin.

Observation contents: 1) Reference atmospheric rainfall: two rain gauges are deployed on a flat riparian beach near the hydrological experimental plot for simultaneous observations. 2) Forest throughfall: a total of 20 rain gauges are installed within the plot, with their layout based on the canopy closure above each gauge. 3) Weight of the lysimeter at 18:00 each day. 4) Throughfall collected in the rain collector beneath the lysimeter.

Observation instruments: 1) Standard 20 cm diameter rain gauges. 2) Self-made lysimeters (20 cm in diameter; total of 4 units; with varying soil and vegetation conditions). 3) Electronic balance (precision: 0.1 g), used to monitor weight changes of the self-made lysimeters.