A classification-based spatiotemporal adaptive fusion model for the evaluation of remotely sensed evapotranspiration in heterogeneous irrigated agricultural area

Wang, Shuai; Wang, Chaozi; Zhang, Chenglong; Xue, Jingyuan; Wang, Pu; Wang, Xingwang; Wang, Weishu; Xin, Zhang; Li, Wangcheng; Huo, Zailin

doi:10.1016/j.rse.2022.112962

Cited by 26 publications

(13 citation statements)

References 61 publications

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“…The pattern of distribution of groundwater depths (cm) and the direction of its movement for selected months after drainag operations This is consistent with [15,16]. and it has been shown through the results that the salinity of the ground water is outside the water classification described according to the classification of the American Salinity Laboratory [13].…”

Section: Figuresupporting

confidence: 79%

“…As the decision was taken to establish 35 monitoring wells according to the ground network that was established and a depth of (0-120) cm. The ground water monitoring holes were distributed to the right and left of the drainage line to be established, so that the ground water monitoring wells became (1,2,3,4,5,6,12,13,14,15,16,17,24,26) located on the left side of the drainage path and the rest of the wells are located on the right side of the drainage line path3.…”

Section: Ground Water Observation Wellsmentioning

confidence: 99%

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Topographical and Hydrological Investigations for the Design of a Drainage Network the Fields of the College of Agriculture are a Model

Frhan,

Hazeem

2023

IOP Conf. Ser.: Earth Environ. Sci.

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In order In order to study the changes that occur in groundwater, the degree of its salinity, the percentage of sodium adsorption, and the total amount of dissolved salts in the samples taken from 35 wells within the study area before starting the drainage operations procedures and comparing them with what happens after the drainage operations begin. An area of 300,000 square meters was selected within the southern fields of the College of Agriculture In the University of Anbar, which is already suffering from the problem of the rise in the ground water level due to the presence of a water source that is considered as a source of nourishment for the ground water within the fields of the college. The results showed that there was a discrepancy in the depths of the groundwater, as the groundwater level decreased to 120 cm after the start of the drainage works, while its level was 87 cm before the drainage as an average for the months of the test selected. The degree of salinity of the ground water followed the same behavior, as a decrease was observed in the degree of salinity of the ground water for the studied samples after conducting the drainage operations compared to its values before the drainage operations, as it reached its lowest value (3.8, 3.12) dS / m after starting the drainage operations, while its values were (5.8, 5.87) dS/m before drainage operations and for the summer and winter seasons, respectively.

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Section: Figuresupporting

confidence: 79%

Section: Ground Water Observation Wellsmentioning

confidence: 99%

Topographical and Hydrological Investigations for the Design of a Drainage Network the Fields of the College of Agriculture are a Model

Frhan,

Hazeem

2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…The spatial distribution of actual evapotranspiration (ET a ) in Jiyuan during simulation period obtained by: using the HYDRUS‐dualKc in a distributed manner for 2012 (a) and 2013 (b); the M‐SWAT simulation for 2012 (c) and 2013 (d); using the remote sensing technique for 2012 (e) (Wang et al, 2022), (g) (Yang et al, 2012) and 2013 (f) (Wang et al, 2022); and the SWAT simulation for 2013 (h).…”

Section: Resultsmentioning

confidence: 99%

“…The comparisons with the ET a from the HYDRUS‐dualKc simulations (in a distributed manner), the remote sensing ET a with 30‐m resolution derived from Landsat data in 2012–2013, 250‐m resolution derived from MODIS data in 2012, and the original SWAT simulation in 2013 (Ren et al, 2018; Wang et al, 2022; Yang et al, 2012) are shown in Figure 9. The original SWAT (Figure 9h) underestimated the ET a (e.g., the northern part natural lands of Jiyuan) while the simulated ET a of M‐SWAT (Figure 9d) was closer to the ET a derived from remote sensing (Figure 9f) and Hydrus‐dualKc (Figure 9b).…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, the simulated ET a of natural land in the northern part of Jiyuan in The disagreement between Figure 9c,g mainly because the remote sensing ET a data had a coarse resolution (250 m) which led to the mixed pixel problem (i.e., one pixel often covers different kinds of land cover types) and affected the data accuracy (Ren et al, 2019;Xiong et al, 2019). For higher resolution remote sensing data (Figure 9e), some places (i.e., natural land near YCA and north of Jiyuan) did not match with other maps due to the limited and low quality of Landsat data in 2012 (Wang et al, 2022). The simulation results suggested that M-SWAT is a reliable tool for accurately estimating ET a and depicting its spatial distribution among various land use types.…”

Section: Regional-scale Assessmentmentioning

confidence: 99%

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A modified SWAT model for mechanistic simulation of soil water‐salt transport and the interactions with shallow groundwater

Mu,

Xun,

Gao

et al. 2023

Hydrological Processes

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Current hydrological models still face difficulties in accurately simulating vadose zone (VZ) hydrological processes in arid watersheds with shallow groundwater environments. Therefore, this article introduces a new mechanistic VZ module coupled with an improved groundwater‐balance (GWB) module to enhance the capabilities of the well‐known Soil Water Assessment Tools (SWAT) model. The main improvements and features of the modified SWAT model (M‐SWAT) include: a numerical VZ module to accurately simulate soil water‐salt transport under variably saturated conditions by solving the head‐formed Richards' equation and advection‐dispersion equation; a GWB module (on a sub‐basin scale for shallow aquifer) coupled with VZ module by proposing an effective way of boundary information exchanges; and a more reasonable water‐salt stress functions (i.e., based on matric head and osmotic head) to calculate root water uptake and plant growth. The M‐SWAT was then tested and evaluated with two‐year observation data from the Yangchang canal command area (YCA, an experimental site) and the Jiyuan Irrigation System (Jiyuan, region‐scale), located in the arid upper Yellow River basin of northwest China. The model produced a good agreement between the simulated and observed data in both calibration and validation with sufficiently small root mean square error (RMSE). The determination coefficient (R2) was greater than 0.51, 0.36, and 0.87 in simulating the soil water‐salt dynamics, groundwater depth fluctuations, and leaf area index development, respectively. Case testing also proved that the M‐SWAT had sufficient computational efficiency and stability for regional application. Further comparisons with previous studies indicated that the M‐SWAT could more accurately and rationally simulate the soil water‐salt dynamics and their interactions in arid watersheds with shallow groundwater tables.

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Efficient agricultural water research under elevated global carbon dioxide concentration – Based on bibliometric analysis

Bai,

Li,

Jiang

et al. 2024

Agricultural Water Management

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A classification-based spatiotemporal adaptive fusion model for the evaluation of remotely sensed evapotranspiration in heterogeneous irrigated agricultural area

Cited by 26 publications

References 61 publications

Topographical and Hydrological Investigations for the Design of a Drainage Network the Fields of the College of Agriculture are a Model

Topographical and Hydrological Investigations for the Design of a Drainage Network the Fields of the College of Agriculture are a Model

A modified SWAT model for mechanistic simulation of soil water‐salt transport and the interactions with shallow groundwater

Efficient agricultural water research under elevated global carbon dioxide concentration – Based on bibliometric analysis

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