This data set is the measurement of the depth of Mapam Yumco Lake during the River and Lake Source Investigation in 2017. It can be used to map lake isobath, to estimate the water quantities in lakes and to study water balance of the basin. The data observed time is from September 5, 2017 to September 7, 2017. It was measured by the Lowrance HDS-5 sonar depth finder. The original measured data contains a lot of invalid depth data, which has all been eliminated in the post-selecting process. The selected measuring line is reasonable, and the data covers various depth gradients. The data is stored as an excel file.
This is the water quality multi-parameter data set of Mapam Yumco Lake during the River and Lake Source Investigation in 2017. It is used to acquire basic physical and chemical indices of lakes. And it can prepare for the following modern observation studies of lakes. The data observed time is from September 4, 2017 to September 7, 2017. It is measured by the YSI EXO2 multi-parameter water quality instrument. Instrument calibration is made before each measurement based on the altitude of the lake and the local pressure. The measuring interval is 0.25s. To ensure the data is frequently and continuously acquired, the instrument is slowly released. The original data includes data measured above the water surface, which is exposed to the air, and it has all been eliminated in the post processing. The data is stored as an excel file.