To explore inorganic hydrochemical characteristics of the upper Yarlung Zangbo River, water samples were collected from the main stream and different tributaries in this region in August 2020. The water was collected with 100mL polyethylene (PE) plastic bottle, and the basic physical and chemical parameters such as pH value (±0.2) and dissolved oxygen (±1%) of the sampling site were measured by multi -parameter water quality monitor (YSI-EX02,USA).,and HCO3- concentration was titrated with 0.025mol/L HCl.The concentrations of Na+, K+, Ca2+, Mg2+, SO42-, NO3- and Cl- ions were analyzed and determined by ion chromatograph (Shenhan CIC-D160, China) in the laboratory. Using Gibbs model, correlation analysis and principal component analysis method, analyzed the one main ion concentration changes, chemical composition characteristics, analytical, and the ion source was designed to reveal inorganic water chemical characteristics of The Tibet plateau glacier melt water runoff, and for plateau typical river water and changing trend forecast provides the basis.
NIU Fengxia
Through the semi-quantitative collection method, benthos research was carried out in 22 lakes in the core area of Qiangtang and Yamzho Lake in the summer of 2020. The relative abundance data of Zoobenthos in alpine lakes in Tibet were obtained by the mixed sampling of littoral and deep-water communities. The results of this data show that among the 6420 selected benthos, 28 species of benthos are identified, belonging to 3 phyla and 7 classes, of which the main benthic groups are gammarus and chironomid, and the dominant species in a few lakes are water beetles. This data improves the recognition accuracy and cognitive range of Zoobenthos in Tibet and will provide a reference for the evaluation of aquatic animal diversity and fishery resources in plateau lakes.
TANG Hongqu
(1) This data set contains a variety of heavy metal concentration data in multi-media, which is of great significance to explore the internal relationship between heavy metal pollution evaluation and heavy metal distribution in water; (2) The data source is to collect water, soil, crops and other samples from Huangshui River and its tributaries on the spot, send them to the laboratory for pretreatment, and complete the detection with relevant instruments; (3) The data set is of high quality and the sampling process is standardized. After collection, the samples are quickly stored in the - 4 ℃ refrigerator and sent to the laboratory for testing. The testing process is strictly carried out in accordance with relevant standards; (4) The data set can be mainly used for ecological risk and health risk assessment, spatial distribution analysis, source analysis, correlation analysis and so on.
ZHANG Fengsong
Rainfall erosivity is one of the important basic data to quantify soil erosion in the Tibet Plateau. High precision rainfall erosivity data is the key to understand the current situation of soil and water loss in theTibet Plateau and formulate soil and water conservation measures. Meanwhile, it can provide a powerful reference for the prevention and control of geological disasters in the Tibet Plateau. Based on the 1-min dense precipitation observations and the grid precipitation product, a new annual rainfall erosivity dataset in Tibet Plateau from 1950 to 2020 is constructed through the steps of correction, reconstruction and validation. This dataset is the rainfall erosivity data set with the highest accuracy and the longest time series in the Tibet Plateau.
CHEN Yueli
The third pole 1:100,000 range data set includes:Mountains(Tibet_Mountains)vector space data set and its attribute name:Name(Name)、Countries Name（CNTRY_NAME）、Countries Referred to as（CNTRY_CODE）、Latitude（LATITUDE）、Longitude(LONGITUDE). The data comes from the 1:100,000 ADC_WorldMap global data set，The data through topology, warehousing and other data quality inspection，Data through the topology, into the library，It's comprehensive, up-to-date and seamless geodigital data. The world map coordinate system is latitude and longitude, D_WGS_1984 datum surface
ADC WorldMap
The dataset of Antarctic mountains(1:1000000) includes vector spatial distribution data and some related attribute data: Name, Country name of the mountains , Country abbreviation, Latitude、 Longitude The data comes from the ADC World Map（1:1000000） global dataset, the data is topological, and it is the comprehensive, latest and seamless geographic digital data. The world map coordinate system is the latitude and longitude, WGS84 datum, and the Antarctic data set is the South Pole Stereographic.
ADC WorldMap
Arctic 1:100,000 mountains data set includes vector spatial distribution data and related attribute data of the Arctic_Mountains in the arctic range: Name, Name of the country where the mountains are located (CNTRY_NAME), abbreviation of the country where the mountains are located (CNTRY_CODE), LATITUDE, LONGITUDE). The data comes from the 1:100,000 ADC_WorldMap global data set，The data through topology, warehousing and other data quality inspection，It's most comprehensive, current and seamless geographic digital data for the whole earth. The world map coordinate system is latitude and longitude, WGS84 datum surface，Antarctic specific projection parameters（North_Pole_Stereographic）.
ADC WorldMap
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