Distribution Characteristics of Phosphorus in the Yarlung Zangbo River Basin

Nan, Shuqing; Li, Jia; Zhang, Linglei; An, Ru; Pu, Xunchi; Huang, Wen

doi:10.3390/w10070913

Cited by 8 publications

(5 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, P concentration in the water bodies of the YLZB River reaches its maximum in the wet season. This conclusion was verified by actually measuring the P concentration in the water bodies of the YLZB River basin [20]. There is always an exchange of substances between the overlying water and the surface sediments.…”

Section: Notesmentioning

confidence: 73%

“…According to the monthly flow process of the Yarlung Zangbo River [20], sample was taken three times, 3 of 21 season, the normal season, and the dry season. In August 2016, 20 samples were collected.…”

Section: Sampling Sites and Timementioning

confidence: 99%

“…The selection of some sampling locations was mainly due to their special nature, such as the Shigatse irrigation station and the widest part of YLZB River. Of course, most of the sampling sites were chosen because of the transportation convenience and because it is easy to mark, for example, hydrological stations, sites near bridges, and sites near towns.According to the monthly flow process of the Yarlung Zangbo River [20], sample was taken three times, 3 of 21 season, the normal season, and the dry season. In August 2016, 20 samples were collected.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Spatial and Seasonal Distribution and Transportation of Different Forms of Phosphorus in the Middle Reaches of the Yarlung Zangbo River

Cheng

Huang

et al. 2018

Water

Self Cite

View full text Add to dashboard Cite

The Yarlung Zangbo River basin ecosystem is fragile. The distribution and transportation of phosphorus is of great significance for aquatic environmental protection and ecological security. The sequential extraction method and molybdenum antimony anti-spectrophotometry were used to measure the concentrations of different forms of phosphorus in the surface sediments from 15 sampling sites along the middle reaches of the Yarlung Zangbo River and its tributaries. The results show that the total phosphorus concentration in the surface sediments is 194.0~540.7 mg/kg, which is mainly composed of inorganic phosphorus. The concentrations of various phosphorus forms ranked as calcium-bound phosphorus (355.6 ± 86.0 mg/kg) > soluble phosphorus (15.9 ± 10.0 mg/kg) > iron-bound phosphorus (12.4 ± 12.3 mg/kg) > organic phosphorus (9.6 ± 6.1 mg/kg) > occluded phosphorus (9.2 ± 3.8 mg/kg) > aluminum-bound phosphorus (5.4 ± 2.3 mg/kg). On the whole, phosphorus concentration is greater in wet season than dry season. Regarding the spatial distribution characteristics, there are great disparities in the different forms of phosphorus in the middle reaches of the Yarlung Zangbo River. Comprehensive analysis shows that phosphorus of this area is mainly self-generated, and concentration of bioavailable phosphorus is small, demonstrating there will not be a large release. We also drew a “specific triangle” of the different forms of phosphorus concentrations in the research area and defined the “α” angle to determine the nutrient status of the overlying water quickly and effectively. Finally, phosphorus flux of the mainstream was estimated. This research may provide information on the phosphorus of Plateau Rivers.

show abstract

Section: Notesmentioning

confidence: 73%

Section: Sampling Sites and Timementioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Spatial and Seasonal Distribution and Transportation of Different Forms of Phosphorus in the Middle Reaches of the Yarlung Zangbo River

Cheng

Huang

et al. 2018

Water

Self Cite

View full text Add to dashboard Cite

show abstract

“…Although weathered soil particles can enter rivers as external sources, they lack organic material, and primary phosphorus is mainly calcium-bound phosphorus, which makes it difficult for natural external inflow to increase the ratio of these two forms of phosphorus. The proportion of these two forms of phosphorus also increases with an increase in artificial external inflow [45]. According to the 2018 Tibetan Statistical Yearbook [46], the population density in Tibet is only 2.55 persons·km −2 , which is much lower than that in the other three river regions, and the population growth rate is 1.06%, which implies that the human activities in the Yarlung Zangbo River region will not increase significantly for a long time.…”

Section: Discussionmentioning

confidence: 99%

Effects of Freeze-Thaw Cycles on Phosphorus from Sediments in the Middle Reaches of the Yarlung Zangbo River

Liao

Jiang

et al. 2019

IJERPH

View full text Add to dashboard Cite

The effect of the freeze-thaw process is an important factor in soil nutrient changes and erosion enhancement. Sediments in the middle reaches of the Yarlung Zangbo River are likely affected by the daily freeze-thaw cycles in winter. Examining the freeze-thaw effects of phosphorus from sediments in this area is of great significance for protecting the structure and safety of the ecosystem. The freeze-thaw process of sediments in the middle reaches of the Yarlung Zangbo River was simulated through laboratory experiments, and different phosphorus contents and particle states were synchronously detected and analyzed. The results show that freeze-thaw cycles can accelerate phosphorus migration and release in the sediments, and the total amount of phosphorus release increases by 12%. After being subjected to freeze-thaw cycles, the sediment particles were broken, and the competition between ions for adsorption sites reduced phosphorus adsorption onto the sediments from the middle reaches of the Yarlung Zangbo River. The organic matter on the sediment surface was also broken down, and the energy dispersive spectroscopy (EDS) results showed that the combined ions that were released competed for the adsorption sites on the particle surfaces, thereby promoting phosphorus release. Among the different forms of phosphorus, aluminum-bound phosphorus (Al-P) and iron-bound phosphorus (Fe-P) are the two most released phosphorus forms by the freeze-thaw process. Although the contents of Al-P and Fe-P only account for 2.41% of the total phosphorus content, both phosphorus forms are biologically available, and freeze-thaw cycles may increase the risk of nutrient loss. This research may provide information for the study of phosphorus in river ecosystems in areas subjected to freeze-thaw cycles.

show abstract

“…Three indicators were used to assess water quality: Dissolved oxygen (C6), nutrients, and toxicity. These factors can reflect the overall water quality of the Lhasa River [ 35 ]. Furthermore, minimum scores for organic pollutants, such as COD Mn , BOD 5 , COD, and NH 3 –N composed the nutrient concentration index (C7).…”

Section: Methodsmentioning

confidence: 99%

Riverine Health Assessment Using Coordinated Development Degree Model Based on Natural and Social Functions in the Lhasa River, China

Chen

Kong

Mei

2022

IJERPH

View full text Add to dashboard Cite

Rivers provide a variety of ecosystem services to humans. However, human interference significantly impairs the rivers’ functions and poses a threat to river health. To increase the understanding of riverine health in Tibet, China from 2011 to 2014, this study used the Lhasa River as a case study and established a multiple indicator system incorporating both natural and social functions of the river. Weights of riverine health indicators were calculated using the entropy method. Moreover, to evaluate the coordination and development of natural and social functions, a coordinated development degree model was developed. The results showed that the entropy weights of natural and social functions in the target layer were 0.67 and 0.33, respectively. Natural functions, social functions, and riverine state index all decreased from upstream to downstream, and marked as “good” during the entire study period. In 2012, the coordinated development degree improved from previously “moderately coordinated” to “highly coordinated”. Furthermore, the development of natural and social functions was synchronized throughout the study period. Further analysis revealed that the construction of hydraulic projects had a significant effect on the hydrological regime, resulting in an increase in social functions of the river. Therefore, the coordinated development degree model is shown to provide new insight into assessing riverine health in terms of both natural and social functions.

show abstract

Distribution Characteristics of Phosphorus in the Yarlung Zangbo River Basin

Cited by 8 publications

References 12 publications

Spatial and Seasonal Distribution and Transportation of Different Forms of Phosphorus in the Middle Reaches of the Yarlung Zangbo River

Spatial and Seasonal Distribution and Transportation of Different Forms of Phosphorus in the Middle Reaches of the Yarlung Zangbo River

Effects of Freeze-Thaw Cycles on Phosphorus from Sediments in the Middle Reaches of the Yarlung Zangbo River

Riverine Health Assessment Using Coordinated Development Degree Model Based on Natural and Social Functions in the Lhasa River, China

Contact Info

Product

Resources

About