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| 1 | Bicarbonate Daily Variations in a Karst River:the Carbon Sink Effect of Subaquatic Vegetation Photosynthesis显示文摘用 Guancun 河,一条地下的喂溪流的河在 Guangxi 的 Rong'an 县,是的中国案例研究,每天生物化学的周期基于收集的数据在这篇论文被检验一经由高分辨率数据记录程序监视和高周波的采样一周。而且,沿着它的流动路径的无机的碳的损失被估计。结果证明地下水输入的化学部件是相当稳定的,显示出很少变化程度;当所有在监视时期上来自二个下游的监视车站的化学参数显示出一天一夜的变化时,在河里建议那项植物活动在河的水化学上有强烈影响。从有 HCO3 的输出流动的地下水的输入流动的比较在高周波的采样期间在下游的监视车站估计时期显示出 HCO3 的强壮的减少,显示河正在失去沿着它的流动路径的无机的碳。损失被估计是沿着 Guancun 河的 1,350 m 节代表无机的碳的大约 94.9 kg/day 的 HCO3 的大约 1,152 mmol/day/m。它意味着秘密地从石灰岩地区常见的地形进入河的 HCO3 流是植物消费或在 authigenic 方解石套住的任何一个并且因此为 Guancun 石灰岩地区常见的地形系统组成碳的一个自然水池。 | ZHANG Cheng WANG Jinliang PU Junbing YAN Jun | 2012 | Acta Geologica Sinica(English Edition)2012，86，4： | 27 |
| 2 | Identifying the Sources of Solutes in Karst Groundwater in Chongqing,China:a Combined Sulfate and Strontium Isotope Approach显示文摘从石灰岩地区常见的地形的地下水地下的溪流在世界喝水供应,和石灰岩地区常见的地形水的 hydrochemical 特征的很重要的来源之中被自然环境和人影响。因此, hydrochemistry 的学习和它的溶质是来源是很重要的保证生活支持系统的正常函数。在这份报纸, thirtyfive 代表石灰岩地区常见的地形地下水样品从不同含水土层(石灰石和白云石) 被收集,各种各样的陆地使用录入重庆跟踪溶质和相对 hydrochemical 过程的来源。在重庆的石灰岩地区常见的地形地下水的 Hydrogeochemical 类型主要具有 CaHCO3 类型或 Ca (Mg ) HCO3 类型。然而,石灰岩地区常见的地形地下水的一些 hydrochemical 类型是 K+Na+CaSO4 类型(G25 地点) 或 CaHCO3+SO4 类型(G26 和 G14 地点) ,显示这些地点的 hydrochemistry 可能被人为的活动或唯一的地质的特征强烈影响。学习地下水的溶解 Sr 集中从 0.57 ~ 15.06 mmol/L ,并且 87Sr/86Sr 从 0.70751 ~ 0.71627 变化了。34SSO42 掉进 6.821.5 的一个范围,与 5.6 的吝啬的价值。87Sr/86Sr 的变化和地下水样品的 Sr 价值显示 Sr 元素被捱过石灰石,白云石和硅酸盐岩石控制。然而, 87Sr/86Sr 对 Sr2+/ 的数字[K++Na+] 证明人为的输入显然也贡献了 Sr 内容。为跟踪详细人为的效果,我们跟踪了石灰岩地区常见的地形地下水根据潜在的硫酸盐来源的 34S 价值在重庆取样的收集的溶质的来源。34S 的变化和地下水样品的 1/SO42 价值显示大气的酸免职(AAD ) ,石膏(GD ) 的溶解,硫化物矿物质(OS ) 的氧化或人为的输入(SF:污水或化肥) 在石灰岩地区常见的地形地下水贡献了溶质。到在重庆石灰岩地区常见的地形区域的地下水的硫化物矿物质,大气的酸沉积物和人为的输入的氧化的影响是普遍的。 | PU Junbing YUAN Daoxian ZHANG Cheng ZHAO Heping | 2012 | Acta Geologica Sinica(English Edition)2012，86，4： | 9 |
| 3 | Differentiation of Algal Blooms and Aquatic Vegetation in Chinese Lakes Using Modified Vegetation Presence Frequency Index Method显示文摘Algal blooms in lakes have become a common global environmental problem. Nowadays, remote sensing is widely used to monitor algal blooms in lakes due to the macroscopic, fast, real-time characteristics. However, it is often difficult to distinguish between algal blooms and aquatic vegetation due to their similar spectral characteristics. In this paper, we used modified vegetation presence frequency index(VPF) based on Moderate-resolution Imaging Spectroradiometer(MODIS) imagery to distinguish algal blooms from aquatic vegetation, and analyzed the spatial and temporal variations of algal blooms and aquatic vegetation from a phenological perspective for five large natural lakes with frequent algal bloom outbreaks in China from 2019 to 2020. We simplified the VPF method to make it with a higher spatial transferability so that it could be applied to other lakes in different climatic zones. Through accuracy validation, we found that the modified VPF method can effectively distinguish between algal blooms and aquatic vegetation, and the results vary from lake to lake. The highest accuracy of 97% was achieved in Hulun Lake, where the frequency of algal outbreaks is low and the extent of aquatic vegetation is stable, while the lowest accuracy of 76% was achieved in Dianchi Lake, which is rainy in summer and the lake is small. Analyses suggests that the time period when algal blooms occur most frequently might not coincide with that when they have the largest area. However, in most cases these two are close in terms of time period. The modified VPF method has a broad scope of application, is easy to implement, and has a high practical value. Furthermore, the method could be established using only a small amount of measured data, which is useful for water quality monitoring on large spatial scales. | PU Jing SONG Kaishan LIU Ge WEN Zhidan FANG Chong HOU Junbing LV Yunfeng | 2022 | Chinese Geographical Science2022，32，5： | 0 |
| 4 | How to Protect the Karst Aquifers?显示文摘The karst aquifers are the most important water resources in Southwest China,where displays the most continuous bare karst around the world and hold about 100 million people.With the rapid expansion of the urbanization,development of the industry and agriculture,the groundwater quality has been degraded.Mineralization of the karst groundwater increases because of development of intensive agriculture.Concentrations of nitrate and sulphate increase notably as a result of the large amount of chemical fertilizer used in agriculture.Waste gas, waste water and waste residues produced in the processes of industrialization and urbanization cause groundwater acidification and an increase of pollutants such as nitrogen,phosphate,chloride, | Junbing Pu,Daoxian Yuan,Yongjun Jiang School of Geographical Sciences,Southwest University,Chongqing 400715,China. | 2009 | 地学前缘2009，16，S1： | 0 |
| 5 | The Sedimentary Features and Significances of Dripwater and Modern Speleothems in Xueyu Cave,Chongqing,China显示文摘Based on the continuous monthly monitoring works of the dripwater and modem speleothems in Xueyu Cave,we measured a high deposit rate of the secondary sediments.Impressively,the mean deposit rate of calcite is 5.33 mg/day,but the variation amplitude is significant during the year.Besides,the monthly variation does not coincide with the geochemical characteristics of the relevant dripwater, and a preliminary test of some hydrophilic and | Aoyu Wang~1,Licheng Shen~1,Junbing Pu~1,Yuchuan Sun~1,Qiong Xiao~1,Yan Yang~1, Chengcheng Yi~1,Yang He~2 1.School of Geographical Sciences,Southwest University,Chongqing 400715,China. 2.Longhe Tourism Exploitation Co.Ltd,Fengdu 648200,China | 2009 | 地学前缘2009，16，S1： | 0 |
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