137Cs Redistribution in Thin Stony Soil of a Carbonate Rock Slope in Southwest China
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Radioactivity research in mosses from typical Karst Regions in Leye Tiankeng, Southern China
2023, Journal of Environmental RadioactivityRefined revealing the chain path of multiple ecosystem services under diverse environmental factor gradients
2023, Science of the Total EnvironmentCitation Excerpt :When the soil type was stony, the mediation effect of soil moisture on NPP directly affecting surface runoff was greater than that of surface runoff on NPP directly affecting sediment yield in the SRB. In the stony soil area with exposed surface rocks, shallow soil layer, and poor water retention, the mediation effect of surface runoff was small, but the mediation effect of soil moisture was more significant (Danalatos et al., 1995; Li et al., 2011). As for the forest, the effect of soil moisture as the mediation variable on NPP directly affecting surface runoff in the SRB was greater than the effect of surface runoff as the mediation variable on NPP directly affecting sediment yield.
Distributions of fallout <sup>137</sup>Cs, <sup>239+240</sup>Pu and <sup>241</sup>Am in a soil core from South Central China
2022, Journal of Environmental RadioactivityCitation Excerpt :The 137Cs activity concentration ranged from 2.66 ± 0.20 mBq/g to 15.45 ± 0.76 mBq/g with an average of 8.40 ± 0.47 mBq/g (137Cs decay corrected to the sampling date). Zhao et al. (2012) measured the 137Cs activity concentrations in soil samples taken from the Jing-Jin-Ji Region in North China, and found that the activity concentration of 137Cs in surface soils in the region of study fluctuated within 0.3 ± 0.1 to 12.9 ± 0.4 mBq/g with an average value of 3.7 mBq/g. Hao et al. (2011) reported the 137Cs activity concentration in soils from Guangxi Province in South China ranged from <2 mBg/g to 24.7 mBq/g (137Cs decay corrected to the sampling date in November 2006). The 137Cs activity concentrations we found in Hunan Province were comparable to those detected in the Jing-Jin-Ji Region in North China and in Guanxi Province.
Soil functions and ecosystem services research in the Chinese karst Critical Zone
2019, Chemical GeologyCitation Excerpt :In order to achieve this, it is necessary to improve knowledge and understanding of the distribution of silicate minerals in interbedded silicate clastic rocks or as impurities in carbonate rocks in the CZ, and quantify the variation in long-term mineral nutrient release exercised by the distribution of silicate minerals. Despite the magnitude of landscape degradation in southwest China, there are still very few studies that comprehensively assess soil erosion within the karst environments of the region (Chen et al., 2011b; Li et al., 2011; Yang et al. 2011; Peng and Wang, 2012; Feng et al., 2016; Huang et al., 2016). Rocky desertification is evidence that soil is being lost at rates far in excess of replacement from the characteristic sloping topography (5–25°; Wang et al., 2004b; Huang and Cai, 2007; Jiang et al., 2009).
Use of anthropogenic radioisotopes to estimate rates of soil redistribution by wind I: Historic use of <sup>137</sup>Cs
2013, Aeolian ResearchCitation Excerpt :Some investigators claim that variability of precipitation infiltration caused by circulation patterns, rain shadowing, runon/runoff processes, and snow drift at the time of radioisotope deposition may affect the spatial patterns (de Jong et al., 1982; Kiss et al., 1988; Wallbrink and Murray, 1996; Parsons and Foster, 2011). It has been recently suggested that in skeletal soils on steep slopes, the use of radioisotopes to estimate redistribution rates may be of limited utility due to rapid runoff and limited incorporation of radioisotopes during the years of fallout deposition (Zhang et al., 2011). Other investigators have found that the variability of radioisotope inventories in sites meeting the requirements for a good reference site are random and not related to landscape position (Pennock et al., 1994; Sutherland, 1994; Owens and Walling, 1996).
Assessment of sediment yield in a small karst catchment by using <sup>137</sup>Cs tracer technique
2012, International Journal of Sediment Research
Supported by the Western Action Program of the Chinese Academy of Sciences (No. KZCX2-XB2-08) and the National Basic Research Program (973 Program) of China (No. 2006CB403200)