The change detection of impervious surface and its impact on runoff in the Qinhuai River Basin, China

Du, Jinkang; Li, Caili; Hu, Rui; Li, Qian; Zheng, Dapeng; Xu, Youpeng; Hu, Shunfu

doi:10.1109/geoinformatics.2011.5981165

Cited by 3 publications

(9 citation statements)

References 14 publications

(17 reference statements)

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“…For example, a simulation study in Taiwan suggested that rice paddy fields generated 55 % lower total runoff and 33 % lower peak flows than dry farms (Wu et al, 1997). However, another simulation study that used the HEC-HMS model for a rice paddy-dominated watershed in southern China found that an increase in impervious surface areas from 3 to 30 % increased the peak-flow rate and storm volume (4-20 %), but had a very limited impact on total annual flow (< 6 %) Du et al, 2011Du et al, , 2012 and thus long-term water balances.…”

Section: Introductionmentioning

confidence: 99%

“…During 2000-2012, the QRB went through dramatic landcover changes characterized by an increase in urban areas and a decrease in paddy fields (Du et al, 2011(Du et al, , 2012Chen and Du, 2014) (Fig. 2).…”

Section: Land Conversion and Change In Laimentioning

confidence: 99%

“…Du et al (2011Du et al ( , 2012 conducted a simulation study suggesting that the elevated high flow was mostly due to an increase in impervious surface area. Our new analysis suggested that in addition to the increase in impervious surface areas, other factors such as reduced ET could be the main causes that contributed to the observed increase in total flow and base flow in the study basin.…”

Section: Regional Hydrologic and Environmental Implicationsmentioning

confidence: 99%

“…The rapid urbanization and population rise in a warming climate in the YRD region has caused serious environmental and resource concerns such as overdrawing and pollution of groundwater, flooding, land subsidence, and urban heat islands (UHIs) (He et al, 2007;Gu et al, 2011;Zhao et al, 2014). The majority of the existing studies on paddy fields have focused on grain yield and irrigation, with little research on the hydrologic response of paddy fielddominated landscapes to urbanization (Du et al, 2011(Du et al, , 2012Kim et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Urbanization dramatically altered the water balances of a paddy field-dominated basin in southern China

Hao

Sun

Liu

et al. 2015

Hydrol. Earth Syst. Sci.

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Abstract. Rice paddy fields provide important ecosystem services (e.g., food production, water retention, carbon sequestration) to a large population globally. However, these benefits are diminishing as a result of rapid environmental and socioeconomic transformations, characterized by population growth, urbanization, and climate change in many Asian countries. This case study examined the responses of stream flow and watershed water balances to the decline of rice paddy fields due to urbanization in the Qinhuai River basin in southern China, where massive industrialization has occurred during the past 3 decades. We found that stream flow increased by 58 % and evapotranspiration (ET) decreased by 23 % during 1986-2013 as a result of a threefold increase in urban areas and a reduction of rice paddy fields by 27 %. Both high flows and low flows increased significantly by about 28 % from 2002 to 2013. The increases in stream flow were consistent with the decreases in ET and leaf area index monitored by independent remote sensing MODIS (Moderate Resolution Imaging Spectroradiometer) data. Attribution analysis, based on two empirical models, indicated that land-use/land-cover change contributed about 82-108 % of the observed increase in stream flow from 353 ± 287 mm yr −1 during 1986-2002 to 556 ± 145 during [2003][2004][2005][2006][2007][2008][2009][2010][2011][2012][2013]. We concluded that the reduction in ET was largely attributed to the conversion of cropland to urban use. The effects of land-use change overwhelmed the effects of regional climate warming and climate variability. Converting traditional rice paddy fields to urban use dramatically altered land surface conditions from an artificial wetlanddominated landscape to an urban land-use-dominated one, and thus was considered an extreme type of contemporary hydrologic disturbance. The ongoing large-scale urbanization of the rice paddy-dominated regions, in humid southern China and East Asia, will likely elevate storm-flow volume, aggravate flood risks, and intensify urban heat island effects. Understanding the connection between land-use/land-cover change and changes in hydrological processes is essential for better management of urbanizing watersheds in the rice paddy-dominated landscape.

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Section: Introductionmentioning

confidence: 99%

Section: Land Conversion and Change In Laimentioning

confidence: 99%

Section: Regional Hydrologic and Environmental Implicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Urbanization dramatically altered the water balances of a paddy field-dominated basin in southern China

Hao

Sun

Liu

et al. 2015

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

show abstract

“…In our case, 16.5% of rice-wheat rotation fields with high ET were converted into urban area characterized by low vegetation coverage with low ET from 2000 to 2013. Thus, the watershed hydrological cycle has been altered [2,6,34,69]. An early study by Hao et al [2] confirmed that the remarkable impacts land use and land cover change have overwhelmed the effects of climate in the QRB.…”

Section: Effects Of Land Use and Land Cover Changes On All Et Componentsmentioning

confidence: 99%

Effects of Urbanization on Watershed Evapotranspiration and Its Components in Southern China

Zheng

Hao

Huang

et al. 2020

Water

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Understanding the effects of land use change on evapotranspiration (ET) and its partitioning to transpiration and evaporation is important for accurately evaluating the likely environmental impacts on watershed water supply, climate moderation, and other ecosystem services (e.g., carbon sequestration and biodiversity). This study used a distributed hydrologic model, MIKE SHE, to partition evapotranspiration into soil evaporation, transpiration, ponded water evaporation, and interception, and examined how the ET partitions affected the water balance in the Qinhuai River Basin from 2000 to 2013. Simulated daily ET was compared to measurements at an eddy flux research site during 2016–2017 (R2 = 0.72). Degradation in rice-wheat rotation fields and expansion of impervious surfaces impacted not only total watershed evapotranspiration, which showed a significant downward trend (p < 0.05), but also its partitioning. A significant (p < 0.01) decrease in transpiration was detected. Ponded water evaporation was the only ET partition that exhibited a significant positive trend (p < 0.05). We concluded that the reduced transpiration as a result of land use and land cover change was the primary factor driving the variation of watershed scale evapotranspiration. In addition, there was an increase in annual water yield (23%) as a response to significant reduction in ET (7%) due to a 175% expansion of urban area in the study watershed. Our study provided insights to the mechanisms of land surface–water cycle interaction and better understanding of the effects of land use change on urban micro-climate such as “urban dry island” and “urban heat island” effects.

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Urbanization dramatically altered the water balances of a paddy field dominated basin in Southern China

Hao¹,

Sun²,

Liu³

et al. 2015

Preprint

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Abstract. Rice paddy fields provide important ecosystem services (e.g., food production, water retention, carbon sequestration) to a large population globally. However, these benefits are declining as a result of rapid environmental and socioeconomic transformations characterized by population growth, urbanization, and climate change in many Asian countries. This case study examined the responses of streamflow and watershed water balances to the decline of rice paddy fields due to urbanization in the Qinhuai River Basin in southern China where massive industrialization has occurred in the region during the past three decades. We found that streamflow increased by 58% and evapotranspiration (ET) decreased by 23% during 1986–2013 as a result of an increase in urban areas of three folds and reduction of rice paddy field by 27%. Both highflows and lowflows increased significantly by about 28% from 2002 to 2013. The increases in streamflow were consistent with the decreases in ET and leaf area index monitored by independent remote sensing MODIS data. The reduction in ET and increase in streamflow was attributed to the large cropland conversion that overwhelmed the effects of regional climate warming and climate variability. Converting traditional rice paddy fields to urban use dramatically altered land surface conditions from a water-dominated to a human-dominated landscape, and thus was considered as one of the extreme types of contemporary hydrologic disturbances. The ongoing large-scale urbanization in the rice paddy-dominated regions in the humid southern China, and East Asia, will likely elevate stormflow volume, aggravate flood risks, and intensify urban heat island effects. Understanding the linkage between land use change and changes in hydrological processes is essential for better management of urbanizing watersheds.

show abstract

The change detection of impervious surface and its impact on runoff in the Qinhuai River Basin, China

Cited by 3 publications

References 14 publications

Urbanization dramatically altered the water balances of a paddy field-dominated basin in southern China

Urbanization dramatically altered the water balances of a paddy field-dominated basin in southern China

Effects of Urbanization on Watershed Evapotranspiration and Its Components in Southern China

Urbanization dramatically altered the water balances of a paddy field dominated basin in Southern China

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