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.
In order to explore the inorganic hydrochemical characteristics of Naqu basin, river water and groundwater were collected in Naqu basin in September 2020 and September 2021. Collect river water and groundwater with 550ml plastic bottles on site. The main anions and anions (ca2+, na+, mg2+, k+, so42- and cl-) are measured with an ion chromatograph (metrohm ecoic, Switzerland), with a measurement accuracy of 1 μ G/l. Bicarbonate (hco3-) is titrated with acid-base indicator and determined with 50ml acid burette. The purpose is to reveal the inorganic hydrochemical characteristics of water bodies in Naqu basin and provide data support for the analysis of groundwater recharge sources in Naqu basin.
This dataset provides the in-situ lake water parameters of 124 closed lakes with a total lake area of 24,570 km2, occupying 53% of the total lake area of the TP.These in-situ water quality parameters include water temperature, salinity, pH,chlorophyll-a concentration, blue-green algae (BGA) concentration, turbidity, dissolved oxygen (DO), fluorescent dissolved organic matter (fDOM), and water clarity of Secchi Depth (SD).
Lake salinity is an important parameter of lake water environment, an important embodiment of water resources, and an important part of climate change research. This data is based on the measured salinity data of lakes in the Qinghai Tibet Plateau. The salinity is characterized by the practical salinity unit (PSU), which is converted from the specific conductivity (SPC) measured by the conductivity sensor. ArcGIS software was used to convert the measured data into space vector format. SHP format, and the measured salinity spatial distribution data file was obtained. The data can be used as the basic data of lake environment, hydrology, water ecology, water resources and other related research reference.
In the summer of 2019, 22 lake water samples were collected in selinco area of Nam Co, Tibet. They were put into plastic bottles. Some samples were titrated on site by alkalinity kit to obtain the concentrations of CO32 - and HCO3 - ions. The rest samples were stored in the refrigerator. After they were brought back to the laboratory, the concentrations of main cations K +, Na +, Ca2 +, Mg2 + were measured by ICP-OES, The concentrations of HNO3 -, SO42 -, F - and Cl - were measured by anion chromatography. The results showed that the highest concentration of Ca2 + in 22 lakes was 34.8ppm in yueqiaco, and the lowest was 1.8ppm in zhangnaicuo, with an average of 11.9ppm. The highest K + ion concentration was 745.6ppm, the lowest was 1.0ppm, the average was 270.9ppm. The highest concentration of Mg2 + was 1632.8ppm in Jiangcuo, and the lowest was 2.5ppm in mudadaryuco, with an average of 180.1ppm. The highest concentration of Na1 + is 5446.0ppm of daze Cuo, and the lowest is 13.8ppm of Mu Cuo, with an average of 1675.3ppm. The highest F-ion concentration was 0.3 mmol / L, the lowest was 0.1 mmol / L, and the average was 0.1 mmol / L. The highest concentration of Cl - was 73.0 mmol / L, the lowest was 0.4 mmol / L, and the average was 19.0 mmol / L. The highest concentration of NO3 - was 0.2 mmol / L, the lowest was 0.1 mmol / L, and the average was 0.2 mmol / L. The highest concentration of S042 - was 219.3 mmol / L, the lowest was 0.1 mmol / L, and the average was 33.3 mmol / L. The highest concentration of CO32 - was 54.0 mmol / L, the lowest was 0.0 mmol / L, and the average was 15.5 mmol / L. The highest concentration of HCO3 - was 50.7 mmol / L, the lowest was 2.0 mmol / L, and the average was 21.1 mmol / L.
The study of chemical weathering is of great significance to understand how the plateau uplift regulates the mechanism of climate change and the circulation of elements and materials in the sphere. The data set is the seasonal major element concentration and stable isotope data of the river water at the hydrological station of the Yellow River Basin originating from the Qinghai Tibet Plateau. There are two hydrological stations in total: 1. Longmen hydrological station in the middle reaches of the Yellow River is the high-resolution (weekly) sample data collected in 2013, and the element concentrations include K, CA, Na, Mg, SO4, HCO3, Cl, etc. The cation data of collected water samples are tested on ICP-AES of Institute of earth environment, Chinese Academy of Sciences, and the anion data are tested on ion chromatograph (ics1200) of Nanjing Institute of geography and lakes, Chinese Academy of Sciences. The uncertainty is within 5%, and HCO3 is tested by titration. The high-resolution (weekly) Li isotope data of river water was tested in MC-ICP-MS of Institute of earth environment, Chinese Academy of Sciences in 2017, and the test accuracy 2sd is better than 5 ‰; 2. Tangnaihai hydrological station on the Yellow River is the river water (month by month) data set collected from July 2012 to June 2014. The major element concentrations include K, CA, Na, Mg, SO4, HCO3, Cl, etc., and the stable isotope data include s, O and H. The data set can be used to study the modern weathering process under the background of the uplift of the Qinghai Tibet Plateau, and provides the first-hand reliable data for the study of physical erosion and chemical weathering in the basin.
The dataset of water quality investigation in the urbanized area of Tibetan Plateau mainly includes the investigation data of water quality in the Huangshui River Basin and other key urban areas of Tibetan Plateau. The data were collected during July-August, 2020, by Hash DR900 water quality monitor. The datasets include the measured water quality of each reach of the Huangshui River, and the upstream and downstream of rivers that flow through major towns on the Tibetan Plateau. The main parameters include: total nitrogen, total phosphorus, ammonia nitrogen, chemical oxygen demand, dissolved oxygen content, pH, hardness, turbidity and chroma. To note, the chemical indexes (total nitrogen, total phosphorus, ammonia nitrogen, chemical oxygen demand) were determined in the laboratory after the scientific expedition, and the time interval between sample collection and water quality determination is too long to sustain the original content of ammonia nitrogen, thus the ammonia nitrogen of some water samples were not measured. In addition, due to the budget restriction, only water samples from the river outlet of towns on the plateau were allowed to measure the chemical indexes. Our dataset will support the study of optimizing the ecological security barrier system and validating ecohydrological models in the key urbanized areas of the Tibetan Plateau.
Tibet Lalu Wetland National Nature Reserve, with a total area of 6.2 square kilometers and an average altitude of 3645 meters, is a typical wetland on the Qinghai Tibet Plateau, belonging to reed peat swamp. The data set includes the following water quality indicators: temperature, air pressure, dissolved oxygen, electrical conductivity, total soluble solids, pH, ORP, biochemical oxygen demand, chemical oxygen demand, total carbon content, total organic carbon content, total phosphorus content, available phosphorus content, total nitrogen content, The contents of ammonium nitrogen and nitrate nitrogen, etc; The data can be used in related scientific research such as soil quality evaluation of Lalu wetland.
From August to September in 2019, water samples of 24 lakes in selinco, Namco and their surrounding areas were collected for the second Qinghai Tibet scientific research. The chlorophyll (CHL, unit: ug / L), total nitrogen (TN, unit: mg / L), total phosphorus (TP, unit: mg / L), dissolved total nitrogen (DTN, unit: mg / L), dissolved total phosphorus (DTP, unit: mg / L), total phosphorus (TP, unit: mg / L), dissolved nitrogen (DTN, unit: mg / L) and dissolved phosphorus (DTP, unit: mg / L) were analyzed Nitrate nitrogen (NO3-N, mg / L), nitrite nitrogen (NO2-N, mg / L), ammonium nitrogen (NH4-N, mg / L) and phosphate (PO4-P, ug / L), total suspended particulates (TSS, mg / L), organic suspended particulates (OSS, mg / L), inorganic suspended particulates (ISS, mg / L), and so on, The unit is mg / L). At the same time, the name of the lake, the abbreviation of the lake and the longitude and latitude data of the point are provided, and the data format is xlsx. The data were analyzed by hand in the laboratory and verified repeatedly by scientific researchers.
The data set is measured by YSI exo2 water quality multi parameter measuring instrument on the Bank of middle lake of Ranwu lake from April to November every year from 2014 to 2020. The sampling interval is 0.25s-1s. The data is the average value after the instrument is stabilized. The sampling geographic coordinates are: longitude 96.795296, latitude 29.459066, altitude 3925m. The measurement parameters are water temperature, conductivity, dissolved oxygen and turbidity, and the specific parameter unit is indicated in the meter. Data culling part of the obvious outliers, the document is empty, please pay attention to the use. The data will be updated from time to time, and can be used by researchers of water chemistry, Lake microorganism or lake physical and chemical properties in Ranwu Lake Basin.