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Wenbin Yang
Inner Mongolia Low Vegetation Coverage Sand Control Technology Development Co., Ltd., Hohho 010000, China

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Journal article
Published: 27 August 2020 in Water
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Soil water moisture is one of the most important influencing factors in the fragile ecosystems in arid sandy regions, and it serves as a bridge connecting the rainfall and groundwater, two important water sources in arid sandy regions. The hydrological process of an arid sandy region occurs sporadically and is highly non-uniform temporally, making it difficult to monitor and predict. The deep soil recharge (DSR) at a sufficiently deep soil layer (usually greater than 200 cm below ground surface) is an important indicator for groundwater recharge in the arid sandy region, and thus the quantitative determination of DSR is of great significance to the evaluation of water resources and the study of water balance in the arid sandy region. Due to the large amount of evaporation, small amount of precipitation, and the long term of the frozen-soil period in the winter and spring, the monitoring of infiltration and determination of DSR in the arid sandy region become challenging. This study selects the Ulanbuh desert plots in northern China to monitor DSR, precipitation and seasonal frozen soil thickness change, and reaches the following conclusions: Even though the annual precipitation is only 48.2 mm in the arid sandy region, DSR will still occur and replenish groundwater. The daily threshold of precipitation for generating measurable DSR is lower than 4 mm, where the DSR value is defined as the downward flux over a unit area per day hereinafter. DSR continues during the frozen period of the winter and spring seasons, and it is generated from water vapor transport and condensation in the deep sandy layer. Summer rainstorms do no show an obvious correlation with DSR, which is unexpected. This study reveals the characteristics of the dynamic water resources movement and transformation in the arid sandy area in Ulanbuh Desert and can serve as an important guideline for the quantitative assessment of water resources in arid sandy regions.

ACS Style

YiBen Cheng; Wenbin Yang; HongBin Zhan; Qunou Jiang; Mingchang Shi; Yunqi Wang. On the Origin of Deep Soil Water Infiltration in the Arid Sandy Region of China. Water 2020, 12, 2409 .

AMA Style

YiBen Cheng, Wenbin Yang, HongBin Zhan, Qunou Jiang, Mingchang Shi, Yunqi Wang. On the Origin of Deep Soil Water Infiltration in the Arid Sandy Region of China. Water. 2020; 12 (9):2409.

Chicago/Turabian Style

YiBen Cheng; Wenbin Yang; HongBin Zhan; Qunou Jiang; Mingchang Shi; Yunqi Wang. 2020. "On the Origin of Deep Soil Water Infiltration in the Arid Sandy Region of China." Water 12, no. 9: 2409.

Journal article
Published: 09 March 2018 in Water
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Irrigated farmland is the main food source of desert areas, and moisture is the main limiting factor of desert farmland crop productivity. Study on the influence of irrigation on desert farmland soil moisture can guide the agricultural water resource utilization and agricultural production in those regions. At present, the efficiency of irrigation water usage in Northwest China is as low as approximately 40% of the irrigated water. To understand the response of farmland soil moisture in different soil types on irrigation in the Ulan Buh Desert of Inner Mongolia of China, this experimental study takes advantage of different infiltration characteristics and hydraulic conductivities of sand, clay, and loam to determine an optimized soil combination scheme with the purpose of establishing a hydraulic barrier that reduces infiltration. This study includes three comparative experiments with each consisting of a 100 cm thick of filled sand, or clay, or loam soil underneath a 50 cm plough soil, with a total thickness of 150 cm soil profile. A new type of lysimeter is installed below the above-mentioned 150 cm soil profile to continuously measure deep soil recharge (DSR), and the ECH2O-5 soil moisture sensors are installed at different depths over the 150 cm soil profile to simultaneously monitor the soil moisture above the lysimeter. The study analyzes the characteristics of soil moisture dynamics, the irrigation-related recharge on soil moisture, and the DSR characteristics before and after irrigation, during the early sowing period from 2 April to 2 May 2017. Research results show that: (1) Irrigation significantly influences the soil moisture of 0–150 cm depths. The soil moisture increase after the irrigation follows the order from high to low when it is in the order of loam, sand, and clay. (2) Irrigation-induced soil moisture recharge occurs on all three soil combinations at 0–150 cm layers, and the order of soil moisture recharge from high to low is: clay (54.3 mm, 43.39% of the total irrigation), loam (39.83 mm, 31.83% of the total irrigation), and sand (33.47 mm, 26.75% of the total irrigation). (3) After the irrigation event, DSR below 150 cm occurs for all three soil combinations. This study reveals the characteristics of irrigation-induced soil moisture recharge and DSR, and it shows that farmland consisting of an upper 50 cm plough soil and a lower 100 cm filled clay soil can save more water resource at the study site, which is useful in agricultural control measure and water resource management in arid regions.

ACS Style

YiBen Cheng; Yanli Li; HongBin Zhan; Hairong Liang; Wenbin Yang; Yinming Zhao; Taojia Li. New Comparative Experiments of Different Soil Types for Farmland Water Conservation in Arid Regions. Water 2018, 10, 298 .

AMA Style

YiBen Cheng, Yanli Li, HongBin Zhan, Hairong Liang, Wenbin Yang, Yinming Zhao, Taojia Li. New Comparative Experiments of Different Soil Types for Farmland Water Conservation in Arid Regions. Water. 2018; 10 (3):298.

Chicago/Turabian Style

YiBen Cheng; Yanli Li; HongBin Zhan; Hairong Liang; Wenbin Yang; Yinming Zhao; Taojia Li. 2018. "New Comparative Experiments of Different Soil Types for Farmland Water Conservation in Arid Regions." Water 10, no. 3: 298.