Estimation of spatial mean soil water storage using temporal stability at the hillslope scale in black locust ( Robinia pseudoacacia ) stands

Duan, Liangxia; Huang, Mingbin; Li, Zhenwei; Zhang, Zhongdian; Zhang, Luodan

doi:10.1016/j.catena.2017.03.023

Cited by 31 publications

(27 citation statements)

References 66 publications

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“…The obvious spatial variation of VSM in each soil layer at any given date showed moderate variability; this is similar to the study results on forested slopes by others [22,40], and can be attributed to the spatial heterogeneity of influencing factors, including soil properties, topography, and canopy structure [11]. The temporal variability of the slope mean VSM decreased with rising soil depth; this is similar to that reported under other land use types, such as grassland [41], gravel-mulched field [21], and artificial re-vegetated desert [42].…”

Section: Spatial and Temporal Variability Of Vsmsupporting

confidence: 75%

“…Elevation is one topographic factor that may affect the spatial variation of VSM, as reported in several studies [11,64], especially under complex terrains conditions [27,35,37,41]. However, in our study, a significant correlation between MRD and elevation was observed only in the 20-40 cm soil layer, similar to the result observed in a study on terraced land [22].…”

Section: Factors Affecting the Spatial Pattern Of Vsmsupporting

confidence: 40%

“…The significant Spearman's rank correlation coefficients for all soil layers in this study indicate a strong temporal stability of the VSM on the larch planation on the hillslope, similar to other forested hillslopes, such as hillslopes forested with Pinus tabulaeformis Carr. [22,40] and Robinia pseudoacacia L. [11]. The decrease of Spearman's rank correlation coefficient with rising soil depth indicates a temporally more stable VSM in deep soil layers than in shallow layers.…”

Section: Temporal Stability Of Vsmmentioning

confidence: 99%

“…For example, Duan et al [11] reported that MRD was significantly negatively correlated with LAI in Robinia pseudoacacia forestland on the Loess Plateau of China. As the most important canopy structure, higher LAI leads to higher evapotranspiration rates and water consumption, and then lower soil moisture, especially in the case of insufficient soil moisture, thus showing a negative correlation with MRD [31,70,71].…”

Section: Factors Affecting the Spatial Pattern Of Vsmmentioning

confidence: 99%

“…Additionally, owing to the high spatio-temporal variability of soil moisture, a large number of sample points are required to derive sufficient information on soil moisture, which is costly in terms of both time and money. An approach that can optimize the sampling points to precisely assess the mean soil moisture is thus desirable [11].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Spatial Pattern and Temporal Stability of Root-Zone Soil Moisture during Growing Season on a Larch Plantation Hillslope in Northwest China

Liu

Wang

et al. 2018

Forests

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Soil moisture plays a decisive role for tree growth and forest ecosystems services supply in dryland regions. Hence, it is necessary to clarify the spatio-temporal variation of soil moisture under field conditions. This study selected a hillslope in the Liupan Mountains covered by the plantation of Larix principis-rupprechtii Mayr (larch), a main afforestation tree species in north and northwest China. The volumetric soil moisture (VSM) in root zone layers was monitored with a time interval of about 15 days during the growing season (from May to October) in 2016 at 48 points on this hillslope. The aim was to evaluate the spatial pattern and temporal stability of soil moisture at slope scale. The results showed a moderate spatial variability of VSM in each soil layer, with the variation coefficients range of 17.12-22.63%. The spatial variability of VSM showed a dependence on the soil wetness and a threshold effect, it increased with rising VSM until the VSM reached a threshold of about 15%, but thereafter decreased. The mean relative difference (MRD) among the 48 points ranged from −30.56% to 27.20%, −29.89% to 39.58%, and −28.13% to 33.71% for the soil layers of 0-20, 20-40, and 40-60 cm, respectively. The associated standard deviation (SDRD) (and range) was 11.38% (5.20-26.06%), 8.28% (4.64-15.63%), and 6.51% (2.00-14.16%) for the soil layers of 0-20, 20-40, and 40-60 cm, respectively. The high Spearman's rank coefficients (p < 0.05) among the measuring dates at each soil layer indicated that the spatial distribution of VSM in the root zone had strong temporal stability. The decrease of Spearman' rank correlation coefficient and mean SDRD with rising soil depth indicated an increasing temporal stability of VSM with rising soil depth. The mean VSM of the three soil layers on the entire hillslope can be estimated by the direct method (using representative points determined by the index of temporal stability (ITS)) successfully, and these representative points determined by ITS were mainly located at the points with a ratio of field capacity to leaf area index (LAI) close to the slope mean. Moreover, the mean VSM of the three soil layers on the entire hillslope can also be estimated by indirect method (using the time-stable points determined by mean absolute bias error (MABE) and considering the offset between slope mean VSM and observed VSM at time-stable points), and the prediction accuracy of the indirect method was better than the direct method. Significant correlation between MRD and soil bulk density, field capacity, capillary porosity, and LAI were observed for all soil layers, indicating that both the water-retention ability in root zone soil (expressed mainly by field capacity) and water-consumption ability of trees (expressed mainly by canopy LAI) are the main factors controlling the spatial pattern of root-zone VSM on the larch plantation hillslope studied.

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Section: Spatial and Temporal Variability Of Vsmsupporting

confidence: 75%

Section: Factors Affecting the Spatial Pattern Of Vsmsupporting

confidence: 40%

Section: Temporal Stability Of Vsmmentioning

confidence: 99%

Section: Factors Affecting the Spatial Pattern Of Vsmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Spatial Pattern and Temporal Stability of Root-Zone Soil Moisture during Growing Season on a Larch Plantation Hillslope in Northwest China

Liu

Wang

et al. 2018

Forests

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Epikarst shallow fissure soil systems are key to eliminating karst drought limitations in the karst rocky desertification area of SW China

et al. 2021

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Surface soil water shortages are among the primary factors limiting revegetation in most degraded regions with shallow soil, especially in karst areas. Finding water sources for plants is an urgent task to ensure maximum vegetation restoration in these areas. We combined soil water content monitoring and isotope tracing to reveal the principal water source supply systems for plants in karst areas. The results showed that the content and storage of water in the shallow fissure soil system (SFSS) of the epikarst zone were consistently higher and more temporally stable than that of the surface soil. Thus, epikarsts with dissolution voids and fissures are important, stable aquifers that provide water to plants. Moreover, the IsoSource results showed that the SFSS was the primary water source for three monitored tree species (Cupressus torulosa D. Don, Pyracantha fortuneana [Maxim.] Li and Rosa cymosa Tratt.), especially C. torulosa and P. fortuneana. The water-uptake patterns of C. torulosa and P. fortuneana changed from dominant SFSS and surface soil water sources during the rainy period to the dominant SFSS and transfer zone (TZ) of vadose zone water sources during the dry period. In contrast, Rhynchospora cymosa uses water from SFSS and TZ water sources only during drought. These results suggest that the SFSS is key to eliminating vegetation restoration limitations due to surface drought in karst areas. It is proposed that deeply rooted plants with dimorphic root systems are optimal for sustainable vegetation restoration in karst areas.

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Soil moisture temporal stability and spatio‐temporal variability about a typical subalpine ecosystem in northwestern China

Zhu

et al. 2020

Hydrological Processes

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Knowledge of the spatial-temporal variability of soil water content is critical for water management and restoration of vegetation in semi-arid areas. Using the temporal stability method, we investigated soil water relations and spatial-temporal variability of volumetric soil water content (VSWC) in the grassland-shrubland-forest transect at a typical semi-arid subalpine ecosystem in the Qilian Mountains, northwestern China. The VSWC was measured on 48 occasions to a depth of 70 cm at 50 locations along a 240-m transect during the 2016-2017 growing seasons. Results

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Estimation of spatial mean soil water storage using temporal stability at the hillslope scale in black locust ( Robinia pseudoacacia ) stands

Cited by 31 publications

References 66 publications

Spatial Pattern and Temporal Stability of Root-Zone Soil Moisture during Growing Season on a Larch Plantation Hillslope in Northwest China

Spatial Pattern and Temporal Stability of Root-Zone Soil Moisture during Growing Season on a Larch Plantation Hillslope in Northwest China

Epikarst shallow fissure soil systems are key to eliminating karst drought limitations in the karst rocky desertification area of SW China

Soil moisture temporal stability and spatio‐temporal variability about a typical subalpine ecosystem in northwestern China

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