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Yan Zhang
Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China

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Preprint content
Published: 23 March 2020
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Vegetation restoration, terrace and check dam construction are the major measures for soil and water conservation on the Loess Plateau. These effective measures of stabilizing soils have significant impacts on soil organic carbon (SOC) distribution. To understand the impact of land-use changes combined with check dam construction on SOC distribution, 1060 soil samples were collected across a watershed on the Loess Plateau. Forestland, shrubland and terrace had significant higher SOC concentrations in the 0-20 cm soil layer than that of sloping cropland.    Land use change affects the process of runoff and sediment transportation, which has an impact on the migration and transformation of soil carbon. The soil erosion of sloping farmland is the most serious, and the maximum annual erosion rate is as high as 10853.56 t·km-2. Carbon sedimented in the dam land was mainly from sloping cropland, and this source percentage was 65%. The application of hydrological controls to hillslopes and along river channels should be considered when assessing carbon sequestration within the soil erosion subsystem. 

ACS Style

Peng Shi; Yan Zhang; Kexin Lu; Zhaohong Feng; Yang Yu. Distribution of soil organic carbon impacted by land-use change and check dam on the Loess Plateau of China. 2020, 1 .

AMA Style

Peng Shi, Yan Zhang, Kexin Lu, Zhaohong Feng, Yang Yu. Distribution of soil organic carbon impacted by land-use change and check dam on the Loess Plateau of China. . 2020; ():1.

Chicago/Turabian Style

Peng Shi; Yan Zhang; Kexin Lu; Zhaohong Feng; Yang Yu. 2020. "Distribution of soil organic carbon impacted by land-use change and check dam on the Loess Plateau of China." , no. : 1.

Journal article
Published: 24 November 2019 in Land
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The large-scale Grain for Green project on the Loess Plateau of China significantly changes the regional landscape pattern, which has a profound impact on runoff and sediment process. The relationship between landscape pattern and runoff and sediment in the Dali River watershed is established. Cropland and grassland areas in the watershed show a downward trend, whereas the woodland and building land increases continuously. The Number of Patches (NP), Patch Density (PD) and Landscape Diversity (SHDI), Landscape Division Index (DIVISION) increase significantly. The Largest Patch Index (LPI) and Landscape Shape Index (LSI) show overall change in the rising and falling rule. The Contagion Index (CONTAG) and Cohesion Index (COHESION) first increase, then decrease. A decreasing trend is shown by runoff and sediment. The annual runoff in 2010 was 29.76% less than in 1960, and the annual sediment load was 84.87% less. NP, PD, COHESION, DIVISION and SHDI have a significant negative correlation with runoff and sediment, and CONTAG and runoff sediment are positively related. This study could provide theoretical support for guiding watershed land use and landscape planning to effectively reduce runoff and sediment transport.

ACS Style

Yan Zhang; Zhilei Bi; Xin Zhang; Yang Yu. Influence of Landscape Pattern Changes on Runoff and Sediment in the Dali River Watershed on the Loess Plateau of China. Land 2019, 8, 180 .

AMA Style

Yan Zhang, Zhilei Bi, Xin Zhang, Yang Yu. Influence of Landscape Pattern Changes on Runoff and Sediment in the Dali River Watershed on the Loess Plateau of China. Land. 2019; 8 (12):180.

Chicago/Turabian Style

Yan Zhang; Zhilei Bi; Xin Zhang; Yang Yu. 2019. "Influence of Landscape Pattern Changes on Runoff and Sediment in the Dali River Watershed on the Loess Plateau of China." Land 8, no. 12: 180.

Review
Published: 21 December 2018 in Applied Sciences
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Nitrate pollution in surface water has become an environmental problem of global concern. The effective way for controlling the nitrate pollution of surface water is to identify the pollution source and reduce the input of nitrate. In recent decades, nitrogen (δ15N) and oxygen (δ18O) isotopes of nitrate has been used as an effective approach for identifying the source and fate of nitrate pollution in surface water. However, owing to the complexity of nitrate pollution source and the influence of isotopic fractionation, the application of this method has some limitations. In this work, we systematically discussed the fundamental principle of using nitrogen and oxygen isotopes to trace the nitrate source, the fate identification of nitrate, and the major testing techniques. Subsequently, the applications of nitrogen and oxygen isotopes for source identification of surface water were illustrated. However, there are still significant gaps in the application of the source identification and transformation mechanisms to nitrate and many research questions on these topics need to be addressed.

ACS Style

Yan Zhang; Peng Shi; Jinxi Song; Qi Li. Application of Nitrogen and Oxygen Isotopes for Source and Fate Identification of Nitrate Pollution in Surface Water: A Review. Applied Sciences 2018, 9, 18 .

AMA Style

Yan Zhang, Peng Shi, Jinxi Song, Qi Li. Application of Nitrogen and Oxygen Isotopes for Source and Fate Identification of Nitrate Pollution in Surface Water: A Review. Applied Sciences. 2018; 9 (1):18.

Chicago/Turabian Style

Yan Zhang; Peng Shi; Jinxi Song; Qi Li. 2018. "Application of Nitrogen and Oxygen Isotopes for Source and Fate Identification of Nitrate Pollution in Surface Water: A Review." Applied Sciences 9, no. 1: 18.