Water Resources最新文献_第10页

Chemical and Microbiological Composition of Tom River Bottom Sediments (Yurginskii District, Western Siberia) 西伯利亚西部尤尔金斯基地区汤姆河底部沉积物的化学和微生物组成

IF 1 4区环境科学与生态学

Water Resources Pub Date : 2023-11-24 DOI: 10.1134/s009780782370015x

V. S. Ovsyannikova, I. V. Russkikh, E. B. Strel’nikova, P. B. Kadychagov

引用次数: 0

Using CAS Models to Investigate the Influence of Land Use on the Concentration of Cr(VI) in Groundwater, Case Study in the Central Region of Chengdu Plain, China 利用CAS模型研究土地利用方式对地下水中Cr(VI)浓度的影响——以成都平原中部地区为例

IF 1 4区环境科学与生态学

Water Resources Pub Date : 2023-11-24 DOI: 10.1134/s0097807822601455

Z. Jing, L. Long-Chuang, Z. Jing-Gang, Z. Jian-Min, Du Hong Bo

{"title":"Using CAS Models to Investigate the Influence of Land Use on the Concentration of Cr(VI) in Groundwater, Case Study in the Central Region of Chengdu Plain, China","authors":"Z. Jing, L. Long-Chuang, Z. Jing-Gang, Z. Jian-Min, Du Hong Bo","doi":"10.1134/s0097807822601455","DOIUrl":"https://doi.org/10.1134/s0097807822601455","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Groundwater is one of most important available water resources in Chengdu Plain. It is sole drinking water in some rural areas, while the concentration of some areas could not meet the drinking water standards. Thus, it is significant to investigate the relationship between the concentration of Cr(VI) and land use types. The concentration of Cr(VI) in 102 groundwater sampling wells were obtained, and the spatial distribution of hexavalent chromium in groundwater was interpolated by Kriging interpolation method. Then, the land use types were analyzed by ENVI. Contributing area surrogate models were employed to investigate the influence of land use type on the concentration of Cr(VI). The following results were obtained, (1) the hexavalent chromium concentrated in crop land, flower-plant/forest land and greenhouse land. (2) The “contributing area surrogate” for the hexavalent chromium pollution region is circular area with a radius of 1750 m. And the pollutant of hexavalent chromium in region groundwater has a good correlation with greenhouse and crop land.</p>","PeriodicalId":49368,"journal":{"name":"Water Resources","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138539888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Utilizing Stable Isotopes and Major Ions to Isolate the Recharge Regime of an Alluvial-Proluvial Fan Aquifer in the Piedmont Region of the South Taihang Mountains, North China Plain 利用稳定同位素和主离子分离华北平原南太行山山前地区冲积-洪积扇含水层补给机制

IF 1 4区环境科学与生态学

Water Resources Pub Date : 2023-11-24 DOI: 10.1134/s0097807822601509

J. Liu, M. Tsujimura, J. Zhang, Z. Yi

{"title":"Utilizing Stable Isotopes and Major Ions to Isolate the Recharge Regime of an Alluvial-Proluvial Fan Aquifer in the Piedmont Region of the South Taihang Mountains, North China Plain","authors":"J. Liu, M. Tsujimura, J. Zhang, Z. Yi","doi":"10.1134/s0097807822601509","DOIUrl":"https://doi.org/10.1134/s0097807822601509","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A thorough understanding of groundwater recharge is critical for sustainable groundwater development in semi-arid areas. To determine the recharge regime in one alluvial-proluvial fan aquifer which usually acts as the main recharge zone of its local groundwater, field surveys and isotopic analyses were conducted in the piedmont region of the South Taihang Mountains of the North China Plain during the rainy (August) and dry (November) seasons. Precipitation could not effectively provide short-term recharge to the alluvial-proluvial fan aquifer due to the deep water table. The fault buried by the mountain front alluvial-proluvial deposits acts as a barrier, inhibiting effective recharge to the overlying Quaternary aquifer. Sulfate concentration and isotopes were more elevated in deep groundwater of the alluvial-proluvial fan area compared to that in the depression region, suggesting that lower deep groundwater potential has resulted in the inter-aquifer flow from the shallow alluvial-proluvial fan aquifer feeding the deep aquifer underneath. Inter-aquifer leakage showed an inverse relationship with the distance from the mountain edge, and its recharge may be influenced by the distribution of the aquitard in the deep aquifer of the proximal fan, leading to a decreased contribution of inter-aquifer leakage. Additionally, the deep groundwater flow in the Sha River alluvial-proluvial fan is disturbed by the hydraulic potential decline in the proximal fan region, as exhibited by a more complex flow pattern and reduced groundwater mixing zone. Our results increase understanding of piedmont hydrology and the management of its related water resources.</p>","PeriodicalId":49368,"journal":{"name":"Water Resources","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138539901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characteristic of Oil Products in Bottom Sediments in Lake Pyasino by GC/MS Method 皮亚西诺湖湖底沉积物中油品特征的GC/MS分析

IF 1 4区环境科学与生态学

Water Resources Pub Date : 2023-11-24 DOI: 10.1134/s0097807823030065

E. S. Brodskii, A. A. Shelepchikov, A. D. Kudryavtseva, E. Ya. Mir-Kadyrova

{"title":"Characteristic of Oil Products in Bottom Sediments in Lake Pyasino by GC/MS Method","authors":"E. S. Brodskii, A. A. Shelepchikov, A. D. Kudryavtseva, E. Ya. Mir-Kadyrova","doi":"10.1134/s0097807823030065","DOIUrl":"https://doi.org/10.1134/s0097807823030065","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The integral methods commonly used to determine oil products, such as gravimetric, IR-photometric, and fluorescent do not take into account the nature of the analyzed compounds and the contribution of biogenic hydrocarbons, the assessment of which requires more detailed analysis, which can be made by GC/MS method. The oil products in Lake Pyasino bottom sediments show the presence of n-alkanes with a considerable predominance of C17 n-alkane and a small predominance of n-C<sub>12</sub>, n-C<sub>14</sub>, n-C<sub>16</sub>, and n-C<sub>18</sub>, reflecting the contribution of microorganisms and algae, as well as the predominance of n-C<sub>23</sub>, n-C<sub>25</sub>, n-C<sub>27</sub>, n-C<sub>29</sub>, n-C<sub>31</sub> due to the contribution of higher terrestrial plants. The chromatogram contains two “humps” of nonseparated compounds in the C<sub>10</sub>−C<sub>21</sub> and C<sub>22</sub>−C<sub>33</sub> regions. Oil products in them are mixtures of alkanes, cycloalkanes with 1–4 rings in a condensed system, and aromatic and naphthene-aromatic hydrocarbons with 1–3 benzol and 1–2 saturated rings in the condensed system, with alkyl substituents containing 0–12 (mostly, 2–8) C atoms.</p>","PeriodicalId":49368,"journal":{"name":"Water Resources","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138539904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on Spatial-Temporal Differentiation of Water Resources Carrying Capacity Evaluation in Liaoning Province 辽宁省水资源承载力评价的时空分异研究

IF 1 4区环境科学与生态学

Water Resources Pub Date : 2023-11-24 DOI: 10.1134/s0097807822602023

Liu Maohua, Liu Le

{"title":"Study on Spatial-Temporal Differentiation of Water Resources Carrying Capacity Evaluation in Liaoning Province","authors":"Liu Maohua, Liu Le","doi":"10.1134/s0097807822602023","DOIUrl":"https://doi.org/10.1134/s0097807822602023","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In order to study the spatial-temporal variation in the carrying capacity of water resources in Liaoning Province, 14 cities in Liaoning are used as research units based on the TOPSIS model (Technique for Order Preference by Similarity to an Ideal Solution). Firstly, the evaluation index system is constructed, and the subjective and objective assignment method combining the AHP method (Analytic Hierarchy Process) and entropy method are adopted to assign weights to the evaluation indexes. Again, the TOPSIS model is combined with GIS (Geographic Information System) to present the results. Finally, through the analysis of the research results, the corresponding countermeasures and suggestions are put forward. It is found that the T value of TOPSIS model closeness in Dalian and Yingkou is the closest to 0.2, which indicates that the carrying capacity is of high quality. The average T value of Fuxin is only 0.0949. The area of high-quality water resources carrying capacity in Liaoning has expanded from 8281 to 12 650 km<sup>2</sup>. The area of low level has expanded from 31 743 to 57 453 km<sup>2</sup>. The alarm area has expanded slightly. Intermediate area and good area has a certain reduction. The research results can provide a reference for the study of water resource, and lay a foundation for the work of economic development and environmental protection in Liaoning Province.</p>","PeriodicalId":49368,"journal":{"name":"Water Resources","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138539920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microplastic Concentrations in Bottom Sediments of the Lakes of Specially Protected Natural Territories: Case Study of the Kizhskie Skerries, Lake Onega and Vodlozero Lake 自然保护区湖泊底部沉积物中的微塑料浓度:以基日斯基湖、奥涅加湖和沃特洛泽洛湖为例

IF 1 4区环境科学与生态学

Water Resources Pub Date : 2023-11-24 DOI: 10.1134/s0097807823030144

M. B. Zobkov, T. A. Efremova

{"title":"Microplastic Concentrations in Bottom Sediments of the Lakes of Specially Protected Natural Territories: Case Study of the Kizhskie Skerries, Lake Onega and Vodlozero Lake","authors":"M. B. Zobkov, T. A. Efremova","doi":"10.1134/s0097807823030144","DOIUrl":"https://doi.org/10.1134/s0097807823030144","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The concentrations of microplastic were determined in bottom sediments of water bodies in specially protected natural territories—Vodlozerskii National Park (Lake Vodlozero) and Kizhi Museum–Reserve (Kizhskie skerries, Lake Onega). The samples were taken at four stations in the Kizhskie skerries, Lake Onega, and at five stations in Lake Vodlozero. Microplastic (≥200 µm) was extracted from the samples by density separation. A random sample of particles was subject to chemical analysis with the use of micro-Fourier-spectrometry. Microplastic was found in all samples. In the Kizhskie skerries, the average concentration of the particles was 3413 ± 1965 pcs/kg dry weight of sediment, which is slightly higher than that determined before for Petrozavoskaya Bay and the open part of Lake Onega. According to chemical analysis, synthetic polymers account for 55% of particles, 21% are modified cellulose, and 24% are of natural origin. Microplastic concentration was maximal near the main passenger berth of Kizhi Museum–Reserve. The mean concentration of particles in the bottom sediments of Vodlozero Lake was lower than that in the Kizhskie Skerries and amounted to 1506 ± 845 pcs/kg, of which 81% are synthetic polymers, 9% are modified cellulose, 10% are polymers of natural origin. The lower concentration of particles of anthropogenic origin in Lake Vodlozero compared with the Kizhskie Skerries is in agreement with the number of tourists-visitors to these natural territories.</p>","PeriodicalId":49368,"journal":{"name":"Water Resources","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138539885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Calculation of Water Quality Index and Its Use for Water Quality Assessment in Lake Sevan 色万湖水质指标的计算及其在水质评价中的应用

IF 1 4区环境科学与生态学

Water Resources Pub Date : 2023-11-24 DOI: 10.1134/s0097807823030041

G. H. Babayan, A. A. Zhukova, Yu. K. Veres

{"title":"Calculation of Water Quality Index and Its Use for Water Quality Assessment in Lake Sevan","authors":"G. H. Babayan, A. A. Zhukova, Yu. K. Veres","doi":"10.1134/s0097807823030041","DOIUrl":"https://doi.org/10.1134/s0097807823030041","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The article gives an example of the choice and implementation of a method for water quality assessment for a large high-mountain lake with long-term unstable level regime and variable morphometry (artificial level decrease by 19 m followed by an increase by 4 m and more). The choice of a procedure for water quality assessment for such a water body requires non-standard solutions. This is made with the use of a modern modification of the Delphi expert panel method. This method gives a quantitative estimate of water quality relative to the initial/desirable state that all managers strive for in order to achieve and maintain water quality. The index of Lake Sevan water quality index SWQI is based on seven priority characteristics with the weight of each of them taken into account. The long-term dynamics of this index confirmed the managerial impact of lake level rise on water quality: a <i>poor</i> water quality (a minimal value of SWQI = 20) was recorded in the years of the lowest level (1976–1990), while a <i>good</i> water quality (the maximal value of SWQI = 69), in the years of highest level (2016–2020); (the coefficient of correlation was 0.82). The advantages of the used index SWQI include the relatively low dependence of the index on the availability of a database and the possibility to use the estimate for balancing the environmental and socioeconomic interests. The general approach to SWQI model can be used to evaluate the water quality of such lakes all over the world.</p>","PeriodicalId":49368,"journal":{"name":"Water Resources","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138539892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Present-Day Structure of the Temperature and Current Fields in Lake Sevan 塞万湖温度场和水流场的现今结构

IF 1 4区环境科学与生态学

Water Resources Pub Date : 2023-11-24 DOI: 10.1134/s0097807823700161

S. A. Poddubnyi, B. K. Gabrielyan, A. I. Tsvetkov

{"title":"The Present-Day Structure of the Temperature and Current Fields in Lake Sevan","authors":"S. A. Poddubnyi, B. K. Gabrielyan, A. I. Tsvetkov","doi":"10.1134/s0097807823700161","DOIUrl":"https://doi.org/10.1134/s0097807823700161","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Long-term features of the vertical and horizontal structure of water temperature field in Lake Sevan are discussed. It is shown that the climate warming has led to an increase in epilimnion temperature in Bol’shoi Sevan in July by 2.0‒3.0°C. The increase in water temperature in hypolimnion was not greater than 1.1°C. In autumn (October), the epilimnion became 1.2°C warmer, while hypolimnion temperature practically has not changed on the average over years. Temperature fields were used to calculate the density currents in summer and autumn periods. A dominating cyclonic water circulation was revealed all over the lake, confirmed by chlorophyll distribution by satellite image data. In the case of large horizontal gradients of water density, the flow velocity can reach 50 cm/s. Autonomous buoy stations revealed a wide range of water temperature variations due to internal waves of different nature. The reversible vertical mixing of water mass by internal waves plays an important role in the distribution of nutrients and plankton within the water mass. The water level rise by ~3 m, unlike it drop by 1981 by 18.48, has not caused any significant changes in lake hydrological regime.</p>","PeriodicalId":49368,"journal":{"name":"Water Resources","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138539883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrogeochemical Modeling of Karst Groundwater in the Fengfeng Mining Area 峰峰矿区岩溶地下水水文地球化学模拟

IF 1 4区环境科学与生态学

Water Resources Pub Date : 2023-11-24 DOI: 10.1134/s0097807822602187

B. Kai, S. Hui, H. Guilei, Y. Hao, Y. Junpeng, C. Xi

{"title":"Hydrogeochemical Modeling of Karst Groundwater in the Fengfeng Mining Area","authors":"B. Kai, S. Hui, H. Guilei, Y. Hao, Y. Junpeng, C. Xi","doi":"10.1134/s0097807822602187","DOIUrl":"https://doi.org/10.1134/s0097807822602187","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The study of groundwater hydrogeochemistry is of great significance to the development, utilization and protection of regional groundwater resources. In this paper, a complete and comprehensive analysis of three runoff zones is carried out in the Fengfeng mining area of Handan City, Hebei Province, China. The Piper trilinear diagram is used to analyze the types of karst groundwater hydrochemistry, the ionic proportionality coefficient method is used to analyze the sources of groundwater chemistry and the formation process, the chlorine-alkali index is used to react to the exchange reactions between cations, and PHREEQC software is also used to invert the groundwater simulation. The results are: the type of karst water hydrochemical in the study area is mainly HCO<sub>3</sub>·SO<sub>4</sub>–Ca·Mg; the ions are mainly influenced by rock halite, carbonate, sulphate, silicate and cation exchange; in the groundwater runoff zone, aragonite, calcite and dolomite are in saturated state, while gypsum and rock halite are in unsaturated state. The study of karst groundwater hydrochemical types, analysis of water-rock interaction and exploration of hydrogeochemical evolution mechanisms are intended to provide reference for karst water supply security and water resources utilization.</p>","PeriodicalId":49368,"journal":{"name":"Water Resources","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138539886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing the Influence of Upstream Basin and Climatic Characteristics on Post-Dam Downstream Streamflow Changes: Empirical Insights from Peninsular India 上游流域和气候特征对坝后下游流量变化的影响评估:来自印度半岛的经验见解

IF 1 4区环境科学与生态学

Water Resources Pub Date : 2023-11-24 DOI: 10.1134/s0097807823600729

J. Sanyal

{"title":"Assessing the Influence of Upstream Basin and Climatic Characteristics on Post-Dam Downstream Streamflow Changes: Empirical Insights from Peninsular India","authors":"J. Sanyal","doi":"10.1134/s0097807823600729","DOIUrl":"https://doi.org/10.1134/s0097807823600729","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Size of the reservoir and dam operation are cited as the primary causes of changes in the post-dam downstream hydrograph in scientific literature. This study investigates whether upstream basin and climatological characteristics also contribute to such changes. Drawing upon the case study of 18 sites across Peninsular India, we employed Multiple Linear Regression (MLR) with two dam-related and five geophysical as well as climatological factors of upstream basins as predictors to determine key influencing causes. Pre- and post-dam flow duration curves were used to characterise changes in flow post dam construction. We considered periods with the least rainfall difference pre- and post-dam and eliminated rainfall’s effect on downstream hydrograph changes. Two additional machine learning feature extraction algorithms, such as SelectKBest with f_regression and mutual information score, were also deployed to identify the most influential driver of changes in the post-dam downstream hydrograph. The outcome of three separate methods provided a robust and unbiased result. The three methods agreed that while dams are the primary determinant of changes in the typical peak monsoon flow and overall flow variability, potential evapotranspiration and land use-soil-slope, represented by US Soil Conservation Service Curve Number (CN) of the upstream catchment, could also be key factors affecting changes in the post-dam flood peak. These findings highlight the importance of considering the geophysical and climatological characteristics of upstream catchments when assessing the impact of dam construction on downstream hydrology, and potentially aid in the placement, size, and operation of new and existing reservoirs.</p>","PeriodicalId":49368,"journal":{"name":"Water Resources","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138539898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0