Multi-Time Scale Evaluation of Forest Water Conservation Function in the Semiarid Mountains Area

Cao, Jianhua; Yang, Hui

doi:10.3390/f12020116

Cited by 16 publications

(5 citation statements)

References 67 publications

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“…In the upstream mountainous catchment, the rainfall‐runoff relationships at most of the stations were well described due to negligible human impact, particularly at the Dongcicun and Fuping stations. The model performance was comparable with previous studies using SWAT (Wang, Cao, & Yang, 2021). In the downstream catchment, highly intensive human activities (e.g., reservoir regulation, agricultural irrigation, industrial production and inhabitant domestic water consumption) seriously disturbed the natural rainfall‐runoff relationship and thus led to less satisfactory simulation performance in the runoff, especially in the plain areas (Yang et al., 2019; Zhao et al., 2014).…”

Section: Discussionsupporting

confidence: 85%

Future Change Projections of Extreme Floods at Catchment Scale and Hydrodynamic Response of Its Downstream Lake Based on Catchment‐Waterbody Relationship Simulation

Hua

Zhang

et al. 2023

JGR Atmospheres

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Lakes are usually formed in low-lying areas by streamflow from their upstream catchments and play an important role in water supply and aquatic ecological balance (Hallouin et al., 2020). The hydrodynamics (e.g., water level, water storage and inundation area) of the lakes directly responses to the streamflow variation of their controlled catchments, which may cause severe economic losses due to lake inundation. The changes in the intensity and frequency of the extreme precipitation due to climate change (Hanel & Buishand, 2010;Kendon et al., 2014) can strongly influence catchment hydrological processes and result in increasing flood risk for the low-lying areas (Jahn, 2015;Monier & Gao, 2015). For example, the large-scale heavy precipitation in the summer of

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Section: Discussionsupporting

confidence: 85%

Future Change Projections of Extreme Floods at Catchment Scale and Hydrodynamic Response of Its Downstream Lake Based on Catchment‐Waterbody Relationship Simulation

Hua

Zhang

et al. 2023

JGR Atmospheres

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“…The details are shown in Table 8. For sustainable ecological construction, there was a need that pursues an alternative proper mixture of land use/cover without augmenting warming and endangering future water availability, which means the proper mixture of land use/cover has lower LST and bigger W than in 2015 (Arora and Montenegro, 2011;Bai et al, 2019;Wang et al, 2021b;Findell et al, 2017).…”

Section: Spatiotemporal Mixture Of Land Use/covermentioning

confidence: 99%

“…However, this plan that expands grasslands to 60 % has not been robustly tested, and little was done to propose the proper percentages of croplands and bare land suitable for the APENC under the government plan. Thus, two criteria, LST and W (Bai et al, 2019;Findell et al, 2017;Wang et al, 2021b), are considered as hydroclimatic thresholds to pursue proper land management plans suitable for APNEC, for the first time, within scenarios simulation of different vegetation restoration under CLM 5.0.…”

Section: Introductionmentioning

confidence: 99%

Determination of appropriate land use/cover pattern based on the hydroclimatic regime to support regional ecological management in the agro-pastoral ecotone of northwest China

Zhu,

2023

Preprint

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Abstract. The agro-pastoral ecotone of northwest China (APENC) has been experiencing large-scale land use/cover change (LUCC) since 1999 as vegetation restoration projects were implemented. Negative environmental effects of excessive re-vegetation have emerged. However, it remains unclear what the optimal mixture of land use/cover in vegetation restoration is to maintain a sustainable ecohydrological environment in the APENC. In this study, we investigate the different scenarios associated with vegetation restoration in the APENC to examine the hydroclimatic impacts of vegetation restoration and identify the proper land use/cover pattern based on hydroclimatic thresholds (cooling surface and higher water conservation) using the Community Land Model version 5.0 (CLM5.0). Results show that the two main types of LUCC in the study region from 2000 to 2015 were the conversion of bare land to grasslands (BL to GRS) and croplands to grasslands (CL to GRS). The BL to GRS decreased the annual mean temperature by -0.17 ℃, while CL to GRS increased the annual mean temperature by 0.96 ℃; ET changes were 53.32 and -184.42 mm yr-1, respectively, leading to an annual spatially averaged land surface temperature (LST) by a cooling range of -0.06 ± 0.15 ℃ and evapotranspiration (ET) increased by a range of 9.70 ± 19.04 mm yr-1 in the study region. The correlation coefficients between biogeophysical characteristics and hydroclimatic change indicated surface albedo was the most sensitive surface characteristic in influencing LST and ET in summer and winter for BL to GRS and CL to GRS, while the LAI + SAI also presented the most significant correlation for CL to GRS throughout the year. Additionally, analysis of change in land use/cover pattern from 2000 to 2015 found that some grids experienced drying and warming as re-vegetation projects due to the offsetting effects of two types of LUCC. Our findings suggest the percentage of grasslands, bare land and croplands in the APENC for 2035 approximately is 60 %, 23 % and 11 %, respectively, which will mitigate the drying and warming surface environment in the semi-arid region. The findings provide important information to support long-term regional sustainable development in the APENC and similar regions.

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“…The ability of an ecosystem to treat and regulate water is called water ecosystem service [1,2]. As one of the key functions of water ecosystem services [3], WCF refers to the process and ability of the ecosystem to keep water under a certain spacetime range and conditions [4][5][6][7][8], which not only maintains green water (precipitation stored in unsaturated soil of plant roots) [9] but also plays a sufficient role in flood storage, flood peak reduction, water purification and runoff regulation [10][11][12][13]. It is an important regulating function of ecosystem services [14].…”

Section: Introductionmentioning

confidence: 99%

Impact of Ecological Restoration Project on Water Conservation Function of Qilian Mountains Based on InVEST Model—A Case Study of the Upper Reaches of Shiyang River Basin

Wang,

Zhou,

et al. 2023

Land

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Scientifically evaluating the influence of ecological restoration projects on the water conservation function (WCF) of regional ecosystems is the foundation for formulating regional ecological restoration policies and optimizing and adjusting ecological restoration projects. In this paper, we considered fully the runoff generation and confluence process in the Qilian Mountains with the actual situation of the basin and re-rated the parameter Z to improve the simulation accuracy of InVEST model. On this basis, the impact of ecological restoration project on the WCF in the upper reaches of Shiyang River Basin (SRB) in the eastern part of Qilian Mountains was quantified. The results showed that, on the whole, the water conservation depth (WCD) of forest land was the largest (138.5 mm) and that of cultivated land was the smallest (24.78 mm), while the water conservation coefficient of forest land was also the largest (93.36%) and that of unused land was the smallest (16.67%). From 1986 to 2018, the WCD showed an increasing trend in the upper reaches of SRB, among them, the WCD in the western tributaries increased faster than that in the eastern tributaries from 1986 to 2000. The significantly increased areas were mainly distributed in the middle reaches of the western tributaries and the river source areas of the eastern tributaries, while the significantly decreased areas were mainly distributed in the river source areas of the western tributaries and the cultivated land expansion area in the middle reaches of the eastern tributaries. From 2000 to 2018, the WCD of the eastern tributaries increased more than that of the western tributaries. The significantly increased areas were mainly distributed in the four eastern tributaries, and the significantly decreased areas were scattered in the middle and lower reaches of each tributary. From 1986 to 2000, the overall influence of land use change on the increase in WCD was negative, while the influence of climate and land use change on the increase in water conservation were both positive from 2000 to 2018. The influence of land use change on WCD was different in different tributaries. Among them, that of the western tributaries (except the Dongda River) was positive in two different periods, while that of the eastern tributaries (except the Xiying River) was changed from negative to positive. The implementation of ecological restoration project was one of the main reasons for the improvement of WCF in Qilian Mountains from 2000 to 2018, with a contribution of 9.04%. In the future, the protection and restoration of decreased areas of WCF should be strengthened, and the Z value determined in this paper is expected to be applied in the arid inland river basins of northwest China.

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Multi-Time Scale Evaluation of Forest Water Conservation Function in the Semiarid Mountains Area

Cited by 16 publications

References 67 publications

Future Change Projections of Extreme Floods at Catchment Scale and Hydrodynamic Response of Its Downstream Lake Based on Catchment‐Waterbody Relationship Simulation

Future Change Projections of Extreme Floods at Catchment Scale and Hydrodynamic Response of Its Downstream Lake Based on Catchment‐Waterbody Relationship Simulation

Determination of appropriate land use/cover pattern based on the hydroclimatic regime to support regional ecological management in the agro-pastoral ecotone of northwest China

Impact of Ecological Restoration Project on Water Conservation Function of Qilian Mountains Based on InVEST Model—A Case Study of the Upper Reaches of Shiyang River Basin

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