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Sectorial water use trends in the urbanizing Pearl River Delta, China.

Yao M, Werners SE, Hutjes RW, Kabat P, Huang H - PLoS ONE (2015)

Bottom Line: Assessing and managing water use is crucial for supporting sustainable river basin management and regional development.The first consistent and comprehensive assessment of sectorial water use in the Pearl River Delta (PRD) is presented by analysing homogenized annual water use data from 2000 to 2010 in relation to socio economic statistics for the same period.Although scarce and uncertain input data and model limitations lead to a high level of uncertainty, the presented conceptualization of water use is useful in exploring the underlying driving forces of water use trends.

View Article: PubMed Central - PubMed

Affiliation: Earth System Science, Wageningen University, Wageningen, the Netherlands.

ABSTRACT
Assessing and managing water use is crucial for supporting sustainable river basin management and regional development. The first consistent and comprehensive assessment of sectorial water use in the Pearl River Delta (PRD) is presented by analysing homogenized annual water use data from 2000 to 2010 in relation to socio economic statistics for the same period. An abstraction of water use, using the concept of water use intensity, and based on equations inspired by those used in global water resource models, is developed to explore the driving forces underlying water use changes in domestic, industrial and agricultural sectors. We do this at both the level of the region as a whole, as well as for the nine cities that constitute the PRD separately. We find that, despite strong population and economic growth, the PRD managed to stabilize its absolute water use by significant improvements in industrial water use intensities, and early stabilisation of domestic water use intensities. Results reveal large internal differentiation of sectorial water use among the cities in this region, with industrial water use intensity varying from -80 to +95% and domestic water use intensity by +/- 30% compared to the PRD average. In general, per capita water use is highest in the cities that industrialised first. Yet, all cities except Guangzhou are expected to approach a saturation value of per capita water use much below what is suggested in recent global studies. Therefore, existing global assessments probably have overestimated future domestic water use in developing countries. Although scarce and uncertain input data and model limitations lead to a high level of uncertainty, the presented conceptualization of water use is useful in exploring the underlying driving forces of water use trends.

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Sectorial water use of the PRD.Absolute (bars, left axis) and relative (lines, right axis) sectorial water use of agriculture, industry and domestic water use of the PRD reported by Guangdong Water Resource Bulletin.
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pone.0115039.g003: Sectorial water use of the PRD.Absolute (bars, left axis) and relative (lines, right axis) sectorial water use of agriculture, industry and domestic water use of the PRD reported by Guangdong Water Resource Bulletin.

Mentions: Fig. 3 presents the homogenized sectorial water uses in the PRD during the period 2000 to 2010. On average about 24 km3 fresh water was used annually. Industry (comprising manufacturing and electricity generation) surpassed agricultural water use in 2002, accounting for 43% of the total water use and remained rather stable afterward in both percentage and absolute amount. Agriculture water use gradually decreased from 9.7 km3 in 2000 to 7.5 km3 in 2010, accounting for 45% and 32% of the total respectively. Domestic water use increased by 5% relative to the total, from 3.8 km3 in 2000 to 5.4 km3 in 2010.


Sectorial water use trends in the urbanizing Pearl River Delta, China.

Yao M, Werners SE, Hutjes RW, Kabat P, Huang H - PLoS ONE (2015)

Sectorial water use of the PRD.Absolute (bars, left axis) and relative (lines, right axis) sectorial water use of agriculture, industry and domestic water use of the PRD reported by Guangdong Water Resource Bulletin.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4340799&req=5

pone.0115039.g003: Sectorial water use of the PRD.Absolute (bars, left axis) and relative (lines, right axis) sectorial water use of agriculture, industry and domestic water use of the PRD reported by Guangdong Water Resource Bulletin.
Mentions: Fig. 3 presents the homogenized sectorial water uses in the PRD during the period 2000 to 2010. On average about 24 km3 fresh water was used annually. Industry (comprising manufacturing and electricity generation) surpassed agricultural water use in 2002, accounting for 43% of the total water use and remained rather stable afterward in both percentage and absolute amount. Agriculture water use gradually decreased from 9.7 km3 in 2000 to 7.5 km3 in 2010, accounting for 45% and 32% of the total respectively. Domestic water use increased by 5% relative to the total, from 3.8 km3 in 2000 to 5.4 km3 in 2010.

Bottom Line: Assessing and managing water use is crucial for supporting sustainable river basin management and regional development.The first consistent and comprehensive assessment of sectorial water use in the Pearl River Delta (PRD) is presented by analysing homogenized annual water use data from 2000 to 2010 in relation to socio economic statistics for the same period.Although scarce and uncertain input data and model limitations lead to a high level of uncertainty, the presented conceptualization of water use is useful in exploring the underlying driving forces of water use trends.

View Article: PubMed Central - PubMed

Affiliation: Earth System Science, Wageningen University, Wageningen, the Netherlands.

ABSTRACT
Assessing and managing water use is crucial for supporting sustainable river basin management and regional development. The first consistent and comprehensive assessment of sectorial water use in the Pearl River Delta (PRD) is presented by analysing homogenized annual water use data from 2000 to 2010 in relation to socio economic statistics for the same period. An abstraction of water use, using the concept of water use intensity, and based on equations inspired by those used in global water resource models, is developed to explore the driving forces underlying water use changes in domestic, industrial and agricultural sectors. We do this at both the level of the region as a whole, as well as for the nine cities that constitute the PRD separately. We find that, despite strong population and economic growth, the PRD managed to stabilize its absolute water use by significant improvements in industrial water use intensities, and early stabilisation of domestic water use intensities. Results reveal large internal differentiation of sectorial water use among the cities in this region, with industrial water use intensity varying from -80 to +95% and domestic water use intensity by +/- 30% compared to the PRD average. In general, per capita water use is highest in the cities that industrialised first. Yet, all cities except Guangzhou are expected to approach a saturation value of per capita water use much below what is suggested in recent global studies. Therefore, existing global assessments probably have overestimated future domestic water use in developing countries. Although scarce and uncertain input data and model limitations lead to a high level of uncertainty, the presented conceptualization of water use is useful in exploring the underlying driving forces of water use trends.

Show MeSH