Skip to Main Content
Effects of urbanization on watershed evapotranspiration and Its components in southern ChinaAuthor(s): Qingzhou Zheng; Lu Hao; Xiaolin Huang; Lei Sun; Ge Sun
Publication Series: Scientific Journal (JRNL)
Station: Southern Research Station
Download Publication (1.0 MB)
DescriptionUnderstanding 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.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationZheng, Qingzhou; Hao, Lu; Huang, Xiaolin; Sun, Lei; Sun, Ge. 2020. Effects of urbanization on watershed evapotranspiration and Its components in southern China. Water. 12(3): 645-. https://doi.org/10.3390/w12030645.
Keywordsevapotranspiration partitioning, land use and land cover change, MIKE SHE model, urbanization, hydrological modeling
- Genes controlling plant growth habit in Leymus (Triticeae): maize barren stalk1 (ba1), rice lax panicle, and wheat tiller inhibition (tin3) genes as possible candidates
- Evaluation of elastic modulus and hardness of crop stalks cell walls by nano-indentation
- Rice straw mulch for post-fire erosion control: assessing non-target effects on vegetation communities
XML: View XML