<p>This data is based on the soil surface moisture, temperature and conductivity data obtained using the Hydra Probe II soil three-parameter sensor in September 2017 and October 2018 by scientific researchers at the Xinjiang Institute of Ecology and Geography of the Chinese Academy of Sciences in the lower reaches of Syr Darya, around Kizilodar City in Kazakhstan, South Kazakhstan, and Gizak Prefecture in Uzbekistan., Voi Prefecture and Samarkand Prefecture (Soil moisture units m3·m-3), a portable GPS receiver is used to locate the sampling point and take photos of the sampling environment. In 2017, 95 GPS points were collected, including soil moisture, temperature and conductivity (62 sample point numbers), and dielectric constant (41 sample point numbers) data, and 44 photos; in 2018, 130 GPS points only had soil moisture, temperature and conductivity data (158 sample point numbers), and 79 photos. </p>
Scientific researchers from the Xinjiang Institute of Ecology and Geography of the Chinese Academy of Sciences conducted field sampling and measurement in September 2017 and October 2018 in the lower reaches of Syr Darya, around the city of Kyzilodar in Kazakhstan, South Kazakhstan, Gizak, Voi, and Samarkand of Uzbekistan.
First, select an area near the main road along the river on Google Earth to draw the sampling square locations, and then arrange 1 sample square and sampling point at a certain distance along the route. The soil moisture, temperature and conductivity data (soil moisture unit m3·m-3) of the soil surface obtained by the Hydra ProbeII soil three-parameter sensor were used. During the collection, a portable GPS receiver was used to locate the sampling points. Each sample was collected twice, repeated 3-5 times each time, and the surrounding environment was photographed and recorded. The sensor electrical signal is stored through the data collector, and the collection of sample points is recorded on the hand book during the collection, compared with the data output by the sensor software, and finally the entry is completed.
This data is of reliable quality and is measured by a Hydra Probe II soil sensor. Its dielectric impedance technology effectively eliminates temperature and salt interference and ensures the accuracy of moisture data (typical ±0.01 m³/m³). The sampling points are positioned by portable GPS (ordinary version accuracy is 2-5 meters), combined with repeated sampling (2 ×3-5 repetitions) and comparison of manual and software data, supplemented by environmental photo recording to ensure data consistency and spatial representation.
| # | number | name | type |
| 1 | XDA20000000 | Other |
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CSTR:33110.11.ariddc.00258
10.12389/ariddc.00258