The Driving Forces of Point Source Wastewater Emission: Case Study of COD and NH4-N Discharges in Mainland China
Abstract
:1. Introduction
2. Methods
2.1. Logarithmic Mean Divisia Index (LMDI) Model
2.2. The Relative Contribution Rate of Each Factor
2.3. The Absolute Contribution Rate of Each Factor
2.4. Study Area and Data Source
3. Results and Discussion
3.1. Temporal and Spatial Trends of Water Resource Consumption and Pollution in Mainland China
3.1.1. The Temporal Evolution of Water Resource Consumption and Pollution in Mainland China
3.1.2. The Spatial Analysis of the Provincial Water Resource Consumption and Pollution in China
3.2. The Spatio-Temporal Analysis of Driving Factors of COD and NH4-N Emissions
3.2.1. The Temporal Decomposition Analysis of COD and NH4-N Emissions
3.2.2. The Spatial Decomposition Analysis of COD and NH4-N Emissions in Different Provinces and Municipalities of China
3.2.3. The Spatial Decomposition Analysis of COD and NH4-N Emissions Effects in Eastern, Central and Western Regions of Mainland China
4. Conclusions and Recommendation
4.1. Conclusions
4.2. Recommendations
Author Contributions
Funding
Conflicts of Interest
Abbreviations
COD | Chemical oxygen demand; |
NH4-N | Ammonia nitrogen; |
LMID | Logarithmic Mean Divisia Index. |
Nomenclature
Symbol | Definition |
It refers to the corresponding provinces or municipalities | |
The total sum of provinces and municipalities | |
It refers to the target year. | |
It refers to the base year. | |
It represents the total number amount of pollutant (COD or NH4-H) that emitted in year throughout the country. | |
It represents the water resource consumption in the province | |
It represents the gross regional product | |
It represents the total population in the province | |
It represents the pollutant emission intensity | |
It depicts the wastewater technology improvement effect | |
It denotes the impact of economic development | |
It represents the population increase effect | |
It represents the relative contribution rate of each factor | |
It reflects the relative total sum of each factor’s effect. | |
It represents the absolute contribution rate of each factor | |
It reflects the absolute total sum of each factor’s effect. |
Appendix A
Time Series | Total Effect | COD Emission Intensity Effect | Technology Improvement Effect | Economic Development Effect | Population Increase Effect |
---|---|---|---|---|---|
2004–2005 | 54.05 | −146.38 | 172.82 | −5.46 | 75.02 |
2005–2006 | −18.83 | −131.86 | 152.28 | 11.30 | 12.90 |
2006–2007 | −45.22 | −191.22 | 180.25 | 10.69 | −45.50 |
2007–2008 | −77.82 | −138.06 | 144.27 | 11.01 | −60.60 |
2008–2009 | −54.63 | −132.15 | 134.06 | 9.23 | −43.50 |
2009–2010 | −52.73 | −143.78 | 150.39 | 6.82 | −39.30 |
2010–2011 | 20.50 | −173.50 | 198.23 | 8.57 | 53.79 |
2011–2012 | −86.22 | −248.07 | 236.64 | 12.67 | −84.98 |
2012–2013 | −97.64 | −211.64 | 205.48 | 11.86 | −91.94 |
2013–2014 | −31.40 | −221.57 | 171.41 | 11.82 | −69.73 |
2014–2015 | −78.55 | −152.96 | 154.07 | 13.01 | −64.43 |
2015–2016 | −129.92 | −123.62 | 99.51 | 9.82 | −144.21 |
2016–2017 | −27.27 | −72.40 | 68.21 | 6.90 | −24.56 |
Sum effect | −625.68 | −2087.22 | 2067.61 | 118.24 | −527.04 |
The relative contribution rate | --- | 118.72% | 396.03% | 392.31% | 22.44% |
The absolute contribution rate | 1 | 12.77% | 42.61% | 42.21% | 2.41% |
Time Series | Total Effect | NH4-N Emission Intensity Effect | Technology Improvement Effect | Economic Development Effect | Population Increase Effect |
---|---|---|---|---|---|
2004–2005 | 14.92 | −14.55 | 17.17 | −0.69 | 16.86 |
2005–2006 | −13.42 | −13.14 | 16.96 | 1.14 | −8.46 |
2006–2007 | −8.69 | −18.62 | 17.34 | 0.99 | −8.98 |
2007–2008 | −7.16 | −12.94 | 13.60 | 1.15 | −5.36 |
2008–2009 | −5.80 | −12.57 | 12.95 | 1.03 | −4.39 |
2009–2010 | −3.67 | −13.93 | 14.26 | 1.04 | −2.30 |
2010–2011 | 65.00 | −17.68 | 19.99 | 0.92 | 68.22 |
2011–2012 | −6.21 | −26.49 | 24.55 | 1.40 | −6.75 |
2012–2013 | −8.64 | −21.92 | 21.58 | 1.30 | −7.67 |
2013–2014 | −2.70 | −23.93 | 18.18 | 1.28 | −7.18 |
2014–2015 | −9.39 | −16.10 | 16.24 | 1.42 | −7.82 |
2015–2016 | −15.43 | −14.65 | 11.72 | 1.18 | −17.18 |
2016–2017 | −2.53 | −9.85 | 9.20 | 0.91 | −2.27 |
Sum effect | −3.73 | −216.35 | 213.74 | 13.06 | 6.71 |
The relative contribution rate | --- | 55.61% | 3223.26% | 3184.36% | 194.51% |
The absolute contribution rate | 1 | 0.84% | 48.41% | 47.83% | 2.92% |
Provinces and Municipalities | Total Effect | COD Emission Intensity Effect | Technology Improvement Effect | Economic Development Effect | Population Increase Effect |
---|---|---|---|---|---|
Beijing | −6.05 | −7.91 | −12.54 | 9.82 | 4.59 |
Tianjin | −6.46 | −9.89 | −20.64 | 17.57 | 6.51 |
Hebei | −37.43 | −29.94 | −107.12 | 91.66 | 7.98 |
Shanxi | −23.64 | −32.15 | −30.77 | 35.68 | 3.59 |
Inner Mongolia | −27.30 | −31.08 | −65.95 | 67.37 | 2.36 |
Liaoning | −63.68 | −63.76 | −88.58 | 86.38 | 2.27 |
Jinlin | −38.09 | −50.33 | −54.28 | 66.20 | 0.30 |
Heilongjiang | −55.80 | −74.92 | −71.39 | 91.42 | −0.90 |
Shanghai | −16.35 | −13.72 | −30.78 | 20.66 | 7.48 |
Jiangsu | −15.65 | −27.27 | −119.30 | 124.89 | 6.02 |
Zhejiang | −16.02 | −6.84 | −83.07 | 66.12 | 7.77 |
Anhui | 8.67 | −4.88 | −71.61 | 83.28 | 1.88 |
Fujian | 2.96 | 2.79 | −66.62 | 61.84 | 4.95 |
Jiangxi | 8.94 | 0.43 | −69.85 | 74.20 | 4.16 |
Shandong | −41.85 | −35.12 | −148.52 | 132.80 | 8.99 |
Henan | −42.09 | −41.44 | −109.13 | 109.18 | −0.70 |
Hubei | −13.61 | −24.36 | −94.85 | 102.61 | 2.99 |
Hunan | −37.03 | −38.68 | −135.72 | 134.42 | 2.94 |
Guangdong | 4.86 | 16.54 | −164.53 | 129.95 | 22.91 |
Guangxi | −64.34 | −65.24 | −123.81 | 126.28 | −1.58 |
Hainan | −2.52 | −2.55 | −15.63 | 14.15 | 1.51 |
Chongqing | −1.97 | −4.07 | −46.27 | 45.34 | 3.02 |
Sichuan | −24.97 | −49.83 | −106.42 | 128.26 | 3.03 |
Guizhou | 5.15 | 2.84 | −37.12 | 41.12 | −1.68 |
Yunnan | 4.73 | 2.02 | −49.03 | 48.55 | 3.19 |
Xizang | 1.13 | 0.90 | −2.07 | 1.95 | 0.36 |
Shanxi | −19.54 | −27.46 | −48.97 | 55.35 | 1.54 |
Gansu | −3.30 | −1.77 | −30.90 | 28.52 | 0.85 |
Qinghai | 1.67 | 3.26 | −13.12 | 10.64 | 0.88 |
Ningxia | 2.31 | 4.67 | −23.34 | 18.60 | 2.37 |
Xinjiang | −9.77 | −15.94 | −45.30 | 42.81 | 8.66 |
Gross effect | −527.04 | −625.68 | −2087.22 | 2067.61 | 118.24 |
Provinces and Municipalities | Total Effect | NH4-N Emission Intensity Effect | Technology Improvement Effect | Economic Development Effect | Population Increase Effect |
---|---|---|---|---|---|
Beijing | −6.05 | −7.91 | −12.54 | 9.82 | 4.59 |
Tianjin | −6.46 | −9.89 | −20.64 | 17.57 | 6.51 |
Hebei | −37.43 | −29.94 | −107.12 | 91.66 | 7.98 |
Shanxi | −23.64 | −32.15 | −30.77 | 35.68 | 3.59 |
Inner Mongolia | −27.30 | −31.08 | −65.95 | 67.37 | 2.36 |
Liaoning | −63.68 | −63.76 | −88.58 | 86.38 | 2.27 |
Jinlin | −38.09 | −50.33 | −54.28 | 66.20 | 0.30 |
Heilongjiang | −55.80 | −74.92 | −71.39 | 91.42 | −0.90 |
Shanghai | −16.35 | −13.72 | −30.78 | 20.66 | 7.48 |
Jiangsu | −15.65 | −27.27 | −119.30 | 124.89 | 6.02 |
Zhejiang | −16.02 | −6.84 | −83.07 | 66.12 | 7.77 |
Anhui | 8.67 | −4.88 | −71.61 | 83.28 | 1.88 |
Fujian | 2.96 | 2.79 | −66.62 | 61.84 | 4.95 |
Jiangxi | 8.94 | 0.43 | −69.85 | 74.20 | 4.16 |
Shandong | −41.85 | −35.12 | −148.52 | 132.80 | 8.99 |
Henan | −42.09 | −41.44 | −109.13 | 109.18 | −0.70 |
Hubei | −13.61 | −24.36 | −94.85 | 102.61 | 2.99 |
Hunan | −37.03 | −38.68 | −135.72 | 134.42 | 2.94 |
Guangdong | 4.86 | 16.54 | −164.53 | 129.95 | 22.91 |
Guangxi | −64.34 | −65.24 | −123.81 | 126.28 | −1.58 |
Hainan | −2.52 | −2.55 | −15.63 | 14.15 | 1.51 |
Chongqing | −1.97 | −4.07 | −46.27 | 45.34 | 3.02 |
Sichuan | −24.97 | −49.83 | −106.42 | 128.26 | 3.03 |
Guizhou | 5.15 | 2.84 | −37.12 | 41.12 | −1.68 |
Yunnan | 4.73 | 2.02 | −49.03 | 48.55 | 3.19 |
Xizang | 1.13 | 0.90 | −2.07 | 1.95 | 0.36 |
Shanxi | −19.54 | −27.46 | −48.97 | 55.35 | 1.54 |
Gansu | −3.30 | −1.77 | −30.90 | 28.52 | 0.85 |
Qinghai | 1.67 | 3.26 | −13.12 | 10.64 | 0.88 |
Ningxia | 2.31 | 4.67 | −23.34 | 18.60 | 2.37 |
Xinjiang | −9.77 | −15.94 | −45.30 | 42.81 | 8.66 |
Gross effect | −527.04 | −625.68 | −2087.22 | 2067.61 | 118.24 |
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Provinces | Municipalities |
---|---|
Hebei, Shanxi, Inner Mongolia, Liaoning, Jilin, Heilongjiang, Jiangsu, Zhejiang, Anhui, Fujian, Jiangxi, Shandong, Henan, Hubei, Hunan, Guangdong, Guangxi, Hainan, Sichuan, Guizhou, Yunnan, Xizang, Shanxi, Gansu, Qinghai, Ningxia, Xinjiang | Beijing Tianjin Shanghai Chongqing |
Region | Total Effect | COD Emission Intensity Effect | Technology Improvement Effect | Economic Development Effect | Population Increase Effect |
---|---|---|---|---|---|
Eastern region | −15.794 | −15.212 | −77.411 | 69.926 | 6.904 |
Central region | −33.209 | −40.834 | −86.224 | 92.500 | 1.350 |
Western region | −6.531 | −10.587 | −42.590 | 44.410 | 2.236 |
Region | Total Effect | NH4-N Emission Intensity Effect | Technology Improvement Effect | Economic Development Effect | Population Increase Effect |
---|---|---|---|---|---|
Eastern Region | 0.847 | 0.936 | −8.424 | 7.564 | 0.771 |
Central Region | −1.078 | −1.999 | −8.693 | 9.434 | 0.180 |
Western Region | 0.457 | 0.080 | −4.157 | 4.319 | 0.215 |
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Zhang, Z.; He, W.; Shen, J.; An, M.; Gao, X.; Degefu, D.M.; Yuan, L.; Kong, Y.; Zhang, C.; Huang, J. The Driving Forces of Point Source Wastewater Emission: Case Study of COD and NH4-N Discharges in Mainland China. Int. J. Environ. Res. Public Health 2019, 16, 2556. https://doi.org/10.3390/ijerph16142556
Zhang Z, He W, Shen J, An M, Gao X, Degefu DM, Yuan L, Kong Y, Zhang C, Huang J. The Driving Forces of Point Source Wastewater Emission: Case Study of COD and NH4-N Discharges in Mainland China. International Journal of Environmental Research and Public Health. 2019; 16(14):2556. https://doi.org/10.3390/ijerph16142556
Chicago/Turabian StyleZhang, Zhaofang, Weijun He, Juqin Shen, Min An, Xin Gao, Dagmawi Mulugeta Degefu, Liang Yuan, Yang Kong, Chengcai Zhang, and Jin Huang. 2019. "The Driving Forces of Point Source Wastewater Emission: Case Study of COD and NH4-N Discharges in Mainland China" International Journal of Environmental Research and Public Health 16, no. 14: 2556. https://doi.org/10.3390/ijerph16142556