Use of a state-space approach to predict soil water storage at the hillslope scale on the Loess Plateau, China

Duan, Liangxia; Huang, Mingbin; Zhang, Luodan

doi:10.1016/j.catena.2015.11.003

Cited by 38 publications

(8 citation statements)

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“…Other studies have also found that soil water storage increases with a decrease in sand content and increased with an increase in clay content. Unlike our study, Duan, Huang, and Zhang () found a negative correlation between soil water storage and silt content. Soil water storage has also been linked to elevation, climate and land use (Duan et al, ).…”

Section: Discussioncontrasting

confidence: 99%

Effects of carbon on moisture storage in soils of the Wisconsin Central Sands, USA

Yost

Hartemink

2019

European J Soil Science

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Quantifying soil water storage is important for plant growth and agricultural production. This is particularly important in sandy soils because they are widely cultivated and prone to drought. We investigated the effect of soil organic carbon (SOC), soil texture and gravel content on soil moisture characteristics in sandy soils. Soil moisture characteristics were analysed using standard soil physical characterization as well as visible–near infrared (vis–NIR) spectroscopy and pedotransfer functions (PTFs). Volumetric water content (−10, −33, −1500 kPa) and available water capacity (AWC) increased by 0.01 to 0.02 m3m−3 with a 2% increase in silt plus clay content. Available water capacity increased by about 0.05 m3m−3 with a 1% increase in SOC. A 5% increase in gravel in the subsoil decreased the volumetric water content of the soil by 0.01 m3m−3. Predictions of volumetric water contents and AWC by vis–NIR were the best when using a random forest model. Pedotransfer functions for AWC predictions performed best when sand, silt, clay, bulk density and SOC were included. Soil moisture storage ranged from 44 to 65 mm in the top 50 cm. At mean evapotranspiration (4.2 mm day−1), irrigation requirements were reduced by 6 days in the sandy soils that have larger SOC and silt contents in the topsoil. These soils are sandy throughout but have subtle differences in particle‐size distribution, SOC concentrations and gravel content. These differences affect soil moisture storage considerably. Soil management practices that increase the SOC contents in these sandy soils favour moisture storage and tend to reduce irrigation requirements. Highlights SOC, soil texture and gravel affect soil moisture characteristics in sandy soils. With vis–NIR and PTFs, soil water storage, water characteristics and AWC in soils with >80% sand can be quantified and predicted. Available water capacity increased by about 0.05 m3m−3 with a 1% increase in SOC. Subtle differences in particle‐size distribution affect soil moisture storage and reduce irrigation requirements.

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Section: Discussioncontrasting

confidence: 99%

Effects of carbon on moisture storage in soils of the Wisconsin Central Sands, USA

Yost

Hartemink

2019

European J Soil Science

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“…The best quadrivariate and quintuple model equations added BD and pH successively. The simulation accuracy, however, did not increase with the introduction of variables, which was consistent with other studies (Duan et al, ; Li et al, ; She, Gao, Song, Timm, & Hu, ).…”

Section: Resultssupporting

confidence: 91%

“…Although this sequence combined both horizontal and vertical variability, which were governed by different processes, the one-dimensional arrangement is consistent with the layout of the sampling points and can represent the spatial variability and dependence of SWC and its associated environmental factors in the sampling space . There also have been a number of studies that have confirmed the feasibility of this type of connection for state-space modelling (Duan, Huang, & Zhang, 2016;Zhao, Shao, Jia, & Zhu, 2017).…”

Section: Field Sampling and Measurementsmentioning

confidence: 99%

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Spatial simulation of soil‐water content in dry and wet conditions in a hectometer‐scale degraded alpine meadow

2018

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Soil‐water content (SWC) is a key factor in restoring degraded vegetation in alpine meadow ecosystems, but it has rarely been spatially simulated on a hectometer scale. We simulated SWC for typical dry and wet days in an alpine meadow using multivariate linear regression and autoregressive state‐space equations based on SWC and other soil, terrain, and vegetation parameters to evaluate the efficiency of these two methods in dry and wet soil‐moisture conditions. SWC measured on a typical dry day (SWC‐D) and a wet day (SWC‐W) increased and decreased with depth, respectively, and SWC‐D was similar to SWC‐W at a depth of 50 cm. Both SWC‐D and SWC‐W were significantly correlated with soil bulk density (BD), capillary porosity, silt content (Silt), gravel and stone content (GSC), pH, and organic carbon density (OCD), and both SWC‐D and SWC‐W were significantly auto‐correlated and cross‐correlated with BD, Silt, GSC, pH, and OCD at more than one lag distance. Multivariate linear regression using three variables in both dry and wet conditions had the highest accuracy, and the accuracy was generally higher for dry conditions than it was for wet conditions. The bivariate state‐space model was the most accurate for both dry and wet soil conditions, but the expression variables were totally different, with pH and OCD for dry day and BD and Silt for wet day. The conditions of soil moisture should thus be considered when choosing variables with which to simulate SWC, instead of only considering the relationships between SWC and other variables.

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“…Thus, soil freeze-thaw processes are important for local ecohydrological processes, such as plant germination and growth in spring [48,49]. The transferred waters flowing over the ground surface could also infiltrate, to be either stored as soil water or recharged to groundwater, especially for the shallow distribution of clay soil [50]. The role of fine-textured soil in retaining water recharged by intermittent ecological water conveyances or prior floods as a lasting legacy to sustain riparian plant species over extended drought periods were also reported in the middle Heihe River, China [51] and the lower Rio Grande River, USA [52].…”

Section: Discussionmentioning

confidence: 99%

The Effect of Water Transfer during Non-growing Season on the Wetland Ecosystem via Surface and Groundwater Interactions in Arid Northwestern China

Qiao

Sun

et al. 2020

Remote Sensing

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The use of ecological water transfer to maintain the ecological environment in arid or semiarid regions has become an important means of human intervention to alleviate vegetation ecosystem degradation in arid and semiarid areas. The water transfer to downstream in a catchment is often carried out during the non-growing season, due to the competitive water use between the upper and middle reaches and lower reaches of rivers. However, the impacts and mechanism of artificial water transfer on vegetation and wetland ecosystem restoration have not been thoroughly investigated, especially in northwest China. Taking the Qingtu Lake wetland system in the lower reaches of the Shiyang River Catchment as the study area, this study analyzed the spatial and temporal distribution surface area of Qingtu Lake and the surrounding vegetation coverage before and after water transfer, by interpreting remote sensing data, the variation of water content in the vadose zone, and the groundwater level by obtaining field monitoring data, as well as the correlation between the water body area of Qingtu Lake and the highest vegetation coverage area in the following year. The conclusion is that there is a positive correlation between the water body area of Qingtu Lake in autumn and the vegetation coverage in each fractional vegetation coverage (FVC) interval in the next summer, especially in terms of the FVC of 3050%. The groundwater level and soil water content increase after water transfer and remain relatively high for the following months, which suggests that transferred water from upstream can be stored as groundwater or soil water in the subsurface through surface water and subsurface water interaction. These water sources can provide water for the vegetation growth the next spring, or support plants in the summer.

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Use of a state-space approach to predict soil water storage at the hillslope scale on the Loess Plateau, China

Cited by 38 publications

References 50 publications

Effects of carbon on moisture storage in soils of the Wisconsin Central Sands, USA

Effects of carbon on moisture storage in soils of the Wisconsin Central Sands, USA

Spatial simulation of soil‐water content in dry and wet conditions in a hectometer‐scale degraded alpine meadow

The Effect of Water Transfer during Non-growing Season on the Wetland Ecosystem via Surface and Groundwater Interactions in Arid Northwestern China

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