Impact of vegetation dynamics on hydrological processes in a semi-arid basin by using a land surface-hydrology coupled model

Jiao, Yang; Lei, Huimin; Yang, Dawen; Huang, Maoyi; Liu, Dengfeng; Yuan, Xing

doi:10.1016/j.jhydrol.2017.05.060

Cited by 76 publications

(40 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sustainability of converted types was slightly higher than that of the unconverted types (Figure 8b,c). Vegetation greening would increase evapotranspiration and soil water consumption by canopy interception, root uptake, and transpiration, directly affecting regional water and energy balance on one hand [13,67,68]. On the other hand, vegetation would alter the physical characteristics of the soil and increase surface roughness, indirectly changing regional water cycling [69][70][71].…”

Section: Implications Of Vegetation Change Sustainability In Ecologicmentioning

confidence: 99%

Changes in Vegetation Greenness in the Upper and Middle Reaches of the Yellow River Basin over 2000–2015

2019

View full text Add to dashboard Cite

The Grain to Green Project (GTGP), a large ecological restoration project aiming to control soil erosion and improve the ecological environment, has been implemented since 1999 and has led to great land use changes with decreased farmland and increased forest and grass, and significant vegetation variations. Understanding vegetation variations for different land use types is important for accessing the present vegetation development and providing scientific guidance for future ecological restoration design and regional sustainable development. With two land use maps and MODIS LAI data, trend analysis, fluctuation analysis, and R/S methods were applied to analyze the vegetation dynamic changes and sustainability for converted land use types from cropland and unconverted types over 2000–2015 in the upper and middle reaches of the Yellow River. The results obtained were as follows: (1) Vegetation greening was remarkable in the entire study region (0.036 yr−1). The increasing rate was higher in wetter conditions with AI < 3 (0.036–0.053 yr−1) than arid regions with AI > 3 (0.012–0.024 yr−1). (2) Vegetation improved faster for converted forestland, shrubland, and grassland than unconverted types under similar drying conditions. Converted shrubland and grassland had a larger relative change than converted forestland. (3) Converted land use types generally exhibited stronger fluctuation than unconverted types with small differences among types. (4) Vegetation exhibited a sustainable increasing trend in the future, which accounted for more than 73.1% of the region, mainly distributed in the middle reach of the Yellow River. Vegetation restoration exerted important influences on vegetation greening and the effect was stronger for converted types than unconverted types.

show abstract

Section: Implications Of Vegetation Change Sustainability In Ecologicmentioning

confidence: 99%

Changes in Vegetation Greenness in the Upper and Middle Reaches of the Yellow River Basin over 2000–2015

2019

View full text Add to dashboard Cite

show abstract

“…Among different types of droughts, hydrological droughts focus on the decrease in the availability of water resources, e.g., surface and/or ground water (Lorenzo-Lacruz et al, 2013). Many researchers paid attention to the historical changes, future evolutions and uncertainties, and causing factors for hydrological droughts (Chang et al, 2016;Kormos et al, 2016;Orlowsky and Seneviratne, 2013;Parajka et al, 2016;Perez et al, 2011;Prudhomme et al, 2014;Van Loon and Laaha, 2015;Wanders and Wada, 2015;Yuan et al, 2017). Most drought projection studies focused on the future changes over a fixed time period (e.g., late 21st century), but recent studies pointed out the importance on hydrological drought evolution at certain warming levels (Roudier et al, 2016;Marx et al, 2018) given the aim of the Paris Agreement.…”

Section: Introductionmentioning

confidence: 99%

More severe hydrological drought events emerge at different warming levels over the Wudinghe watershed in northern China

Jiao

Yuan

2019

Hydrol. Earth Syst. Sci.

Self Cite

View full text Add to dashboard Cite

Abstract. Assessment of changes in hydrological droughts at specific warming levels is important for an adaptive water resources management with consideration of the 2015 Paris Agreement. However, most studies focused on the response of drought frequency to the warming and neglected other drought characteristics, including severity. By using a semiarid watershed in northern China (i.e., Wudinghe) as an example, here we show less frequent but more severe hydrological drought events emerge at 1.5, 2 and 3 ∘C warming levels. We used meteorological forcings from eight Coupled Model Intercomparison Project Phase 5 climate models under four representative concentration pathways, to drive a newly developed land surface hydrological model to simulate streamflow, and analyzed historical and future hydrological drought characteristics based on the standardized streamflow index. The Wudinghe watershed will reach the 1.5, 2 and 3 ∘C warming levels around 2015–2034, 2032–2051 and 2060–2079, with an increase in precipitation of 8 %, 9 % and 18 % and runoff of 27 %, 19 % and 44 %, and a drop in hydrological drought frequency of 11 %, 26 % and 23 % as compared to the baseline period (1986–2005). However, the drought severity will rise dramatically by 184 %, 116 % and 184 %, which is mainly caused by the increased variability in precipitation and evapotranspiration. The climate models and the land surface hydrological model contribute to more than 80 % of total uncertainties in the future projection of precipitation and hydrological droughts. This study suggests that different aspects of hydrological droughts should be carefully investigated when assessing the impact of 1.5, 2 and 3 ∘C global warming.

show abstract

“…The maximum flux, U h g,max , depends on the depth of the groundwater, the type of soil moisture characteristic curve and the condition at the surface (Gardner, 1958). These equations have an exponential form (Gardner, 1958;Yang et al, 2011;Zammouri, 2001),…”

Section: Upward Flux From Groundwatermentioning

confidence: 99%

A unique vadose zone model for shallow aquifers: the Hetao irrigation district, China

Liu

Wang

Huo

et al. 2019

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. Rapid population growth is increasing pressure on the world water resources. Agriculture will require crops to be grown with less water. This is especially the case for the closed Yellow River basin, necessitating a better understanding of the fate of irrigation water in the soil. In this paper, we report on a field experiment and develop a physically based model for the shallow groundwater in the Hetao irrigation district in Inner Mongolia, in the arid middle reaches of the Yellow River. Unlike other approaches, this model recognizes that field capacity is reached when the matric potential is equal to the height above the groundwater table and not by a limiting soil conductivity. The field experiment was carried out in 2016 and 2017. Daily moisture contents at five depths in the top 90 cm and groundwater table depths were measured in two fields with a corn crop. The data collected were used for model calibration and validation. The calibration and validation results show that the model-simulated soil moisture and groundwater depth fitted well. The model can be used in areas with shallow groundwater to optimize irrigation water use and minimize tailwater losses.

show abstract

Impact of vegetation dynamics on hydrological processes in a semi-arid basin by using a land surface-hydrology coupled model

Cited by 76 publications

References 74 publications

Changes in Vegetation Greenness in the Upper and Middle Reaches of the Yellow River Basin over 2000–2015

Changes in Vegetation Greenness in the Upper and Middle Reaches of the Yellow River Basin over 2000–2015

More severe hydrological drought events emerge at different warming levels over the Wudinghe watershed in northern China

A unique vadose zone model for shallow aquifers: the Hetao irrigation district, China

Contact Info

Product

Resources

About