Next Article in Journal
Study on the Adsorption Capacities for Airborne Particulates of Landscape Plants in Different Polluted Regions in Beijing (China)
Previous Article in Journal
Oxidative Stress Mechanisms Caused by Ag Nanoparticles (NM300K) are Different from Those of AgNO3: Effects in the Soil Invertebrate Enchytraeus Crypticus
Article Menu

Export Article

Open AccessArticle
Int. J. Environ. Res. Public Health 2015, 12(8), 9603-9622; doi:10.3390/ijerph120809603

Seasonal Variation and Sources of Dissolved Nutrients in the Yellow River, China

1
Key Laboratory of Marine Chemistry Theory and Technology, Ocean University of China, Qingdao 266100, China
2
Tianjin Marine Environmental Monitoring Center, State Oceanic Administration People's Republic of China, Tianjin 300450, China
3
Key Laboratory of Marine Environment and Ecology, Ocean University of China, Qingdao 266100, China
*
Author to whom correspondence should be addressed.
Academic Editor: Miklas Scholz
Received: 20 May 2015 / Accepted: 10 August 2015 / Published: 14 August 2015
View Full-Text   |   Download PDF [1076 KB, uploaded 14 August 2015]   |  

Abstract

The rapid growth of the economy in China has caused dramatic growth in the industrial and agricultural development in the Yellow River (YR) watershed. The hydrology of the YR has changed dramatically due to the climate changes and water management practices, which have resulted in a great variation in the fluxes of riverine nutrients carried by the YR. To study these changes dissolved nutrients in the YR were measured monthly at Lijin station in the downstream region of the YR from 2002 to 2004. This study provides detailed information on the nutrient status for the relevant studies in the lower YR and the Bohai Sea. The YR was enriched in nitrate (average 314 μmol·L−1) with a lower concentration of dissolved silicate (average 131 μmol·L−1) and relatively low dissolved phosphate (average 0.35 μmol·L−1). Nutrient concentrations exhibited substantial seasonal and yearly variations. The annual fluxes of dissolved inorganic nitrogen, phosphate, and silicate in 2004 were 5.3, 2.5, and 4.2 times those in 2002, respectively, primarily due to the increase in river discharge. The relative contributions of nutrient inputs to nitrogen in the YR were: wastewater > fertilizer > atmospheric deposition > soil; while to phosphorus were: wastewater > fertilizer > soil > atmospheric deposition. The ratios of N, P and Si suggest that the YR at Lijin is strongly P-limited with respect to potential phytoplankton growth. View Full-Text
Keywords: Yellow River; nutrients; source; fluxes Yellow River; nutrients; source; fluxes
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Gong, Y.; Yu, Z.; Yao, Q.; Chen, H.; Mi, T.; Tan, J. Seasonal Variation and Sources of Dissolved Nutrients in the Yellow River, China. Int. J. Environ. Res. Public Health 2015, 12, 9603-9622.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Int. J. Environ. Res. Public Health EISSN 1660-4601 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top