Climatic and human-related indicators and their implications for evapotranspiration management in a watershed of Loess Plateau, China

Lv, Xizhi; Zuo, Zhiyan; Sun, Junyi; Ni, Yongxin; Wang, Zhihui

doi:10.1016/j.ecolind.2019.01.019

Cited by 21 publications

(22 citation statements)

References 41 publications

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“…Usually, PET constitutes the upper limit of AET. As Lv et al (2019) [8] underline, PET is higher than precipitation in arid areas, thus AET is close to the latter, whereas precipitation is higher than PET in humid areas, therefore, PET is close to AET. Pan evaporation (PE), meaning the depth of the water evaporated from the wet surface of an evaporation pan, can serve according to Sun et al (2018) [9] as a proxy of PET since, besides their differences, they both quantify the evaporative demand.…”

Section: Types Of Etmentioning

confidence: 74%

“…Forests can enhance both ET and infiltration rates, thereby reducing surface runoff and enhancing groundwater recharge [8]. It has been documented that in tropical forests soil moisture in the top 1-1.5 m layer is lower than 34 mm, hence deeper soil moisture and groundwater contribute to the transpiration demand of vegetation during the dry season [93].…”

Section: Et Affects Groundwater Rechargementioning

confidence: 99%

“…The combined effects which LU/LC change along with climate change triggers on AET should be thoroughly studied since they cause alterations to variables such as albedo, LAI, and root depth which in turn lead to different ET rates [8]. Abatzoglou and Williams (2016) [100] after analyzing the consequences of several fire events in Western continental US forests over 1984-2015, found that anthropogenic climate change is responsible for 2/3 of the increase in RET which, along with VPD, is the most affected parameter by anthropogenic climate change.…”

Section: Aet Rates After Wildfiresmentioning

confidence: 99%

“…Human activities such as LU/LC change over the past decades account for ET variations by several researchers. Lv et al (2019) [8] analyzed AET between 1986-2016 in the Yellow River basin. They found that the extended LU/LC change including conversion of the sloped terrain into terraced fields, dam constructions, forest, and vegetation implementation led to an increase in AET.…”

Section: Anthropogenic Impacts On Etmentioning

confidence: 99%

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Evapotranspiration Trends and Interactions in Light of the Anthropogenic Footprint and the Climate Crisis: A Review

Dimitriadou

Nikolakopoulos

2021

Hydrology

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Evapotranspiration (ET) is a parameter of major importance participating in both hydrological cycle and surface energy balance. Trends of ET are discussed along with the dependence of evaporation to key environmental variables. The evaporation paradox can be approached via natural phenomena aggravated by anthropogenic impact. ET appears as one of the most affected parameters by human activities. Complex hydrological processes are governed by local environmental conditions thus generalizations are difficult. However, in some settings, common hydrological interactions could be detected. Mediterranean climate regions (MCRs) appear vulnerability to the foreseen increase in ET, aggravated by precipitation shifting and air temperature warming, whereas in tropical forests its role is rather beneficial. ET determines groundwater level and quality. Groundwater level appeared to be a robust predictor of annual ET for peatlands in Southeast Asia. In semi-arid to arid areas, increases in ET have implications on water availability and soil salinization. ET-changes after a wildfire can be substantial for groundwater recharge if a canopy-loss threshold is surpassed. Those consequences are site-specific. Post-fire ET rebound seems climate and fire-severity-dependent. Overall, this qualitative structured review sets the foundations for interdisciplinary researchers and water managers to deploy ET as a means to address challenging environmental issues such as water availability.

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Section: Types Of Etmentioning

confidence: 74%

Section: Et Affects Groundwater Rechargementioning

confidence: 99%

Section: Aet Rates After Wildfiresmentioning

confidence: 99%

Section: Anthropogenic Impacts On Etmentioning

confidence: 99%

See 2 more Smart Citations

Evapotranspiration Trends and Interactions in Light of the Anthropogenic Footprint and the Climate Crisis: A Review

Dimitriadou

Nikolakopoulos

2021

Hydrology

View full text Add to dashboard Cite

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“…Nevertheless, much work has focused on soil moisture, groundwater recharge, and water yield but pay less attention to the dynamics of ET which is the most active process in the regional hydrological cycle. Until recently, some researchers have explored the variation of ET in response to climate change and human activities (Gao et al, 2020; Jin et al, 2017; Lv et al, 2019; Shao et al, 2019; Wang et al, 2020). However, most of these research efforts were limited to specific regions or within shorter periods.…”

Section: Introductionmentioning

confidence: 99%

Rapid Urbanization and Agricultural Intensification Increase Regional Evaporative Water Consumption of the Loess Plateau

Liang

Zhang²,

Jing-bo

et al. 2020

JGR Atmospheres

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Changing evapotranspiration (ET) will impact freshwater availability, knowledge of which is a critical prerequisite for policy development related to water resources management in an evolving climate, especially for water-limited regions. However, the socioeconomic effects are not considered due to the lack of detailed information about this. Here we used a well-validated remote sensing model and multiple socioeconomic factors to investigate the driving factors of ET changes over the Loess Plateau during 1982-2012. Results showed that the modeled annual ET significantly increased by~2 mm yr −2 during this period (p < 0.001), caused by increased transpiration (2.16 mm yr −2) and interception (0.27 mm yr −2), which was partly offset by decreased soil evaporation (−0.47 mm yr −2). Meanwhile, although the average ET of the forest was larger (480.4 ± 14.8 mm yr −1), it was found that the change in total ET of the region was dominated by that in grassland and cropland (1.1 km 3 yr −2 , 90% altogether). Factorial simulations indicated that the intensifying ET over 79.4% and 9.1% of the study area can be explained by vegetation greening and climate change, respectively. Further analysis suggested that the vegetation greening and the increased ET were primarily associated with the rapid urbanization and agricultural intensification. Our findings highlight the potential unfavorable effects of socioeconomic activities on water resources management on this coupled natural-human system that is already facing water scarcity issues. 1. Introduction Water is especially valuable for food production and ecosystem functioning (Immerzeel et al., 2020; Oki & Kanae, 2006). Global trends of population growth, rising living standards, and rapidly increasing urbanization are increasing the demand for water resources (Florke et al., 2013; Steffen et al., 2015; Wada et al., 2014). Added to this is the growing threat of climate change which will have enormous effects on water availability, and thus challenge global sustainable development (Qin et al., 2020). It has been reported that water scarcity affects more than 40% of the global population and is projected to rise. Over 1.7 billion people are currently living in river basins where water use exceeds recharge (https://www.un.org/sustainabledevelopment/ water-and-sanitation/). The contradiction between the supply and demand of water resources is particularly strong in arid and semi-arid regions where these competing uses can be found upstream, downstream, and sometimes across borders (

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Stand ages adjust fluctuating patterns of soil respiration and decrease temperature sensitivity after revegetation

Tong

Xiao

et al. 2020

Soil Science Soc of Amer J

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Revegetation plays an essential role in controlling soil erosion and influencing soil respiration (Rs) by changing the vegetation coverage and soil biochemical characteristics. Soil respiration and its temperature sensitivity (Q10) have been studied comprehensively. However, the effect of stand age after revegetation on Rs and Q10 remains unclear. We selected four stands (i.e., eroded hillslopes [EBs] and 0‐ to 5‐yr, 5‐ to 10‐yr, and 10‐yr apple orchards) to investigate the changes in Rs and Q10 values. A soil CO2 flux system (Li‐8100) was used to measure Rs in situ from July 2018 to December 2018 in the Luoyugou watershed on the Chinese Loess Plateau. The average Rs rate showed decreased and increased periods with stand age. Changes in Rs were mainly induced by soil nutrient status, which accounted for 44.5% of the heavy weight in principal component analysis. The Q10 values decreased with stand age after revegetation and followed the order EB (4.96) > 0‐ to 5‐yr apple orchard (3.02) > 5‐ to 10‐yr apple orchard (2.25) > 10‐yr apple orchard (1.67). Our results suggest that Rs is substantially influenced by fungal richness and soil microbial biomass carbon (C), and the Q10 values are explained by the nonmetric multidimensional scaling ordinations of bacteria, which in turn are influenced by labile organic C. We demonstrate that converting EBs to apple orchards could be an effective way to decrease Rs and Q10 values. The fluctuating patterns of Rs with stand age should be considered when accurately evaluating the global C balance and predicting future climate change.

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Climatic and human-related indicators and their implications for evapotranspiration management in a watershed of Loess Plateau, China

Cited by 21 publications

References 41 publications

Evapotranspiration Trends and Interactions in Light of the Anthropogenic Footprint and the Climate Crisis: A Review

Evapotranspiration Trends and Interactions in Light of the Anthropogenic Footprint and the Climate Crisis: A Review

Rapid Urbanization and Agricultural Intensification Increase Regional Evaporative Water Consumption of the Loess Plateau

Stand ages adjust fluctuating patterns of soil respiration and decrease temperature sensitivity after revegetation

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