Distribution and Trend Analysis of DIN in Marine Environment Waters under Reclamation

2013 ◽  
Vol 864-867 ◽  
pp. 1000-1003 ◽  
Author(s):  
Ying Jie Zhao ◽  
Ming Chang Li ◽  
Guang Lou Li ◽  
Run Hong Jiao ◽  
Yuan Yuan Cao
Keyword(s):  
Water Quality ◽  
Environmental Management ◽  
Sustainable Development ◽  
Marine Environment ◽  
Inorganic Nitrogen ◽  
Grid Method ◽  
Dissolved Inorganic Nitrogen ◽  
Natural Neighbor ◽  
Fitting Method ◽  
Regional Sustainable Development

Marine environment is an essential aspect for the regional sustainable development. The distribution and trend of pollutant factors is a key guidance to environmental management. In this paper, the distribution and trend of dissolved inorganic nitrogen (DIN) in marine environment waters is researched for guiding and improve the environmental impact assessment in the Caofeidian marine district, Tangshan Bay. The natural neighbor grid method and the least squares fitting method are used for the distribution and the trend respectively. The research results show that the part of DIN exists exceeded forth level of water quality and the trend of DIN is on the rise in recently.

Research on the Enriched Characteristic and Trend of Heavy Metal Pb in Different Marine Medium

2013 ◽  
Vol 864-867 ◽  
pp. 1017-1020
Author(s):  
Ming Chang Li ◽  
Ying Jie Zhao ◽  
Guang Lou Li ◽  
Yuan Yuan Cao
Keyword(s):  
Heavy Metal ◽  
Grid Method ◽  
Environmental Research ◽  
Characteristic Analysis ◽  
Marine Waters ◽  
Natural Neighbor ◽  
Fitting Method ◽  
Regional Sustainable Development ◽  
Marine Environmental ◽  
Marine Medium

Heavy metals are important marine environmental factors for the safety and regional sustainable development. In this paper, the Caofeidian marine district in Tangshan Bay is considered as the case for the environmental research. The distribution and trend of heavy metal Pb in marine waters and sediment is analyzed by the natural neighbor grid method and the least squares fitting method. The enriched characteristic of Pb in different marine medium is studied by the trend of Pb in waters and the sediment. The research results show that the part of Pb exists exceeded forth level of water quality in 2007 and the trend of Pb in sediment is on the rise, oppositely in waters. The enriched characteristic analysis points out the object of environmental management.

scholarly journals Analysis on the Evolution Trend of Seawater Quality and Eutrophication in Tianjin Hangu Agricultural and Fishery Area from 2010 to 2019

2021 ◽  
Vol 245 ◽  
pp. 02024
Author(s):  
Yi Chen
Keyword(s):  
Water Quality ◽  
Pollution Control ◽  
Inorganic Nitrogen ◽  
The State ◽  
Dissolved Inorganic Nitrogen ◽  
Functional Area ◽  
Nitrogen And Phosphorus ◽  
Seawater Quality ◽  
Sea Area

Through the collection and analysis of COD, dissolved inorganic nitrogen (DIN) and active phosphate monitoring data in Tianjin Hangu Agricultural and fishery area from 2010 to 2019, this paper analyzed and studied the structure of nutrients and the state of eutrophication. The results show that in recent ten years, the water quality of Tianjin Hangu Agricultural and Fishery Area has basically met the water quality requirements of functional area, the regional nitrogen pollution has been suppressed, and the eutrophication index of sea area has shown a decreasing trend year by year, but the nitrogen and phosphorus nutrient structure is still in the state of “phosphorus restriction”. Pollution control of sea areas and conservation of aquatic germplasm resources are still urgent.

scholarly journals Traceability and Emission Reduction of Dissolved Inorganic Nitrogen in Minjiang Estuary, China

2021 ◽  
Vol 18 (19) ◽  
pp. 10017
Author(s):  
Chenchen Fan ◽  
Peng Zhang ◽  
Gangfu Song ◽  
Huaru Wang ◽  
Bingyi Wang
Keyword(s):  
Water Quality ◽  
Inorganic Nitrogen ◽  
National Standards ◽  
Dissolved Inorganic Nitrogen ◽  
Quality Model ◽  
Model Calculations ◽  
Minjiang River ◽  
Global Environmental ◽  
Near Shore ◽  
Coefficient Method

The accumulation of dissolved inorganic nitrogen (DIN) in estuaries has become a global environmental problem. A two-dimensional, hydrodynamic water quality model was constructed in this study to investigate the sources of DIN pollution in the Minjiang Estuary. The concentration response field between the stream input and DIN in the estuary was established by using the surveyed source data of the study area. A sharing coefficient method was used to calculate the contribution percentage of each outfall to derive and propose a reasonable nitrogen reduction plan. The results showed that the input of land-based nitrogen into the Minjiang River contributed more than half of the DIN in the near-shore sea; the middle and upper reaches of the Minjiang River largely influenced the estuary area (38.57%). Conversely, the estuary and the coastline accounted for a smaller proportion of only 5.24%, indicating that an integrated DIN reduction should be implemented in the estuary area of the whole river basin. The model calculations showed that the reduction results, after remediation according to the current national standards for wastewater discharge in rivers, were not satisfactory. Thus, a new scheme is proposed in this paper—the total nitrogen (TN) input from land-based sources into the Minjiang Estuary and from the Shuikou Dam to the Min’an section should be reduced to below 31.64%; simultaneously, the DIN concentration discharged from the Shuikou Dam should be controlled and maintained below 0.5 mg·L−1 (TN = 0.8 mg·L−1). These results will provide guidelines for developing strategies for the improvement of DIN and water quality in similar estuaries.

Multi-Scale Analysis of Marine Environmental Situation in the Caofeidian Nearshore District

2014 ◽  
Vol 937 ◽  
pp. 659-662
Author(s):  
Ying Jie Zhao ◽  
Ming Chang Li ◽  
Yuan Yuan Cao
Keyword(s):  
Environmental Management ◽  
Field Data ◽  
Inorganic Nitrogen ◽  
Scale Analysis ◽  
Dissolved Inorganic Nitrogen ◽  
Multi Scale ◽  
Environmental Situation ◽  
Marine Environmental ◽  
Multi Scale Analysis ◽  
Whole Water

Analysis of marine environment, especially the multi-scale analysis is an efficient means to obtain the environmental situation and guide the environmental management. In this paper, the field data, max, min and average of dissolved inorganic nitrogen (DIN) and phosphate in the Caofeidian marine district, Tangshan Bay is analyzed. The whole water quality situation could be grasped through these analyses. The research results show that the distribution of pollution is disequilibrium and the high value district of pollution exists in research district too.

Time Series Correlation Analysis of Pollution in Marine Environment Waters

2014 ◽  
Vol 522-524 ◽  
pp. 52-55 ◽  
Author(s):  
Ying Jie Zhao ◽  
Ming Chang Li ◽  
Guang Lou Li ◽  
Yuan Yuan Cao
Keyword(s):  
Time Series ◽  
Correlation Analysis ◽  
Inorganic Nitrogen ◽  
Computation Method ◽  
Spearman Correlation ◽  
Dissolved Inorganic Nitrogen ◽  
Fitting Method ◽  
Synchronous Development ◽  
The Relationship ◽  
Source Of Pollution

The correlation analysis of pollution time series is an essential tool for obtaining the relationship in adjacent marine waters and the source of pollution. In this paper, the correlation of the dissolved inorganic nitrogen (DIN) in the Caofeidian marine district and the Beidaihe marine district, Tangshan Bay is analyzed. The spearman correlation coefficient computation method and the least squares fitting method are used for the correlation and the trend respectively. The research results show that the trend of DIN is on the rise in recently. Simultaneously, some certain correlation exists in the Caofeidian marine district and the Beidaihe marine district, owing to the adjacent characteristics and synchronous development in this district.

scholarly journals Reef exposure to river-borne contaminants: a spatial model

2009 ◽  
Vol 60 (11) ◽  
pp. 1132 ◽  
Author(s):  
M. Maughan ◽  
J. Brodie
Keyword(s):  
Water Quality ◽  
Quality Improvement ◽  
Great Barrier Reef ◽  
Inorganic Nitrogen ◽  
Suspended Sediments ◽  
Barrier Reef ◽  
Dissolved Inorganic Nitrogen ◽  
Water Quality Improvement ◽  
Management Board ◽  
Contaminant Load

Rivers flowing into the Great Barrier Reef carry contaminants such as suspended sediments, dissolved inorganic nitrogen, total phosphorus and pesticides. To measure the extent and direction of the contaminants after they enter the Great Barrier Reef lagoon, a model was created using river volume, flooding variability, contaminant load, distance and direction as inputs. A GIS was used to calculate and visualise the exposure of the contaminants to the reefs for the current day, as well as modelling scenarios for pre-European arrival loads, and land management using realistic targets set by a regional Natural Resource Management board for water quality improvement planning purposes. The results show that a reduction in the dissolved inorganic nitrogen load exiting the Tully and Murray Rivers reduces the exposure of reefs close to the basin, but that reefs further east of the basin are significantly influenced by other rivers, highlighting that management for water quality improvement in neighbouring basins is also required.

LA EDUCACIÓN AMBIENTAL PARA EL DESARROLLO SOSTENIBLE EN LA FORMACIÓN DE TÉCNICOS COMPETENTES.

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Pedro Rodríguez Orozco ◽  
Madelin Rodríguez Rensoli
Keyword(s):  
Environmental Management ◽  
Sustainable Development ◽  
Environmental Education ◽  
Key Words ◽  
Professional Education ◽  
Middle Level ◽  
The Sustainable Development ◽  
Palabras Clave ◽  
Middle Level Students

El desarrollo de la educación ambiental para el desarrollo sostenible, se convierte en una necesidad de la formación de los estudiantes del nivel técnico medio dentro de la Educación Técnica Profesional (ETP), es por ello que en el presente artículo, a partir de aplicar los métodos de revisión documental y sistematización, se debate acerca de los términos educación ambiental y gestión ambiental para el desarrollo sostenible, posibilitan identificar la necesidad que tienen el tratamiento metodológico y didáctico para que los docentes y funcionarios incorporen los temas medio ambientales en la formación de los técnicos medios de la especialidad de Refrigeración.   Palabras clave: Educación ambiental; Desarrollo sostenible y Educación Técnica Profesional   ABSTRACT   The development of the environmental education for the sustainable development becomes a necessity for the formation of the technical middle level students of the Technical Professional Education. Hence, it is debated in this article, by applying the methods of documentary review and systematization, the terms environmental education and environmental management for the sustainable development, identify the need for the methodological and didactic treatment, so that the docents and officials incorporate the environmental topics into the technician´s formation in the specialty of refrigeration.   Key words: Environmental Education, Sustainable development, and Technical Professional Education   Recibido: diciembre 2015Aprobado: febrero 2015

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