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| 1 | Lacustrine environment responses to human activities in the past 300 years in Longgan Lake catchment, southeast China显示文摘The chronology of a gravity core sediment from Longgan Lake center was defined by 210Pb, combining with historic events recorded by document and sediment. The relationship between vegetation, soil erosion and lake nutrient state was discussed based on pollen, magnetic parameters, diatoms, phosphorus and pigments. The results show that the lake has undergone twice obvious transformations from oligotrophic to mesotrophic condition. Two eutrophications occurring at about 1768AD and the beginning of the 20th century respectively were related to external nutrient loading increase resulting from the enhanced human activities in the lake catchment. It is probable that strength of human actions in historic periods was influenced more or less by climatic changes. The lake eutrophication presented a more serious tendency because of the wide use of chemical fertilizer, reclamation of wetland and wetland vegetation destruction around the lake in the last 40 years. | 羊向东 朱育新 张振克 王苏民 沈吉 吴艳宏 | 2002 | Science China Earth Sciences2002，45，8： | 14 |
| 2 | Spatial distribution of surface rock fragment on hillslopes in a small catchment in wind-water erosion crisscross region of the Loess Plateau显示文摘The cover and size distributions of surface rock fragment in hillslopes were investigated by using digital photographing and treating technique in a small catchment in wind-water erosion crisscross region of the Loess Plateau. The results indicated that the maximal cover of rock fragment was pre-sented at mid-position in steep hillslope. Rock fragment presented a general decreasing-trend along the hillslope in gentle hillslope. Rock fragment cover was positively related to gradient, rock fragment size decreased generally along the hillslope, and the size reduced with the gradient. The mean size of rock fragment was at a range of 6―20 mm in the steep hillslope, rock fragment size > 50 mm was rarely presented. The covers of rock fragment at different positions were markedly related to the quantities of rock fragment < 40 mm. The area of rock fragment of 2―50 mm accounted for 60% or more of the total area, dominating the distribution of rock fragment in the hillslopes. | ZHU YuanJun1,2 & SHAO MingAn1 1 Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Northwest Agriculture and Forestry University, Yangling 712100, China 2 Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China | 2008 | Science China Earth Sciences2008，51，6： | 12 |
| 3 | Preliminary study on assessment of nutrient transport in the Taihu Basin based on SWAT modeling显示文摘With the Taihu Basin as a study area, using the spatially distributed and mechanism-based SWAT model, preliminary simulations of nutrient transport in the Taihu Basin during the period of 1995~2002 has been carried out. The topography, soil, meteorology and land use with industrial point pollution discharge, the loss of agricultural fertilizers, urban sewerage, and livestock drainages were all considered in the boundary conditions of the simulations. The model was calibrated and validated against water quality monitoring data from 2001 to 2002. The results show that the annual total productions of nitrogen (TN) and phosphorus (TP) into Lake Taihu are 40000t and 2000t respectively. Nutrient from the Huxi Region is a major resource for Lake Taihu. The non-point source (surface source) pollution is the main form of catchment sources of nutrients into Lake Taihu,occupied TN 53% and TP 56% respectively. TN and TP nutrients from industrial point pollution discharge are 30% and 16%, and sewerage in both forms of point source and non-point source are TN 31% and TP 47%. Both the loss of agricultural fertilizers and livestock drainages from the catchment should be paid more attention as an important nutrient source. The results also show that SWAT is an effective model for the simulation of temporally and spatially nutrient changes and for the assessment of the trends in a catchment scale. | LAI Geying, YU Ge & GUI Feng Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008, China The Graduate School of the Chinese Academy of Sciences, Beijing 100039, China Key Lab of Poyang Lake Ecological Environment and Resource Development, Jiangxi Normal University, Nanchang 330027, China | 2006 | Science China Earth Sciences2006，49，z1： | 11 |
| 4 | Characteristics of Caragana korshinskii and Hippophae rhamnoides stemflow and their significance in soil moisture enhancement in Loess Plateau, China显示文摘Stemflow of xerophytic shrubs represents a significant component of water replenishment to the soil-root system and influences water utilization of plant roots at the stand scale,especially in water-scarce semi-arid ecosystems.The stemflow of two semi-arid shrubs(Caragana korshinskii and Hippophae rhamnoides)and its effect on soil moisture enhancement were evaluated during the growing season of 2011 in the semi-arid loess region of China.The results indicated that stemflow averaged 12.3%and 8.4%of the bulk precipitation for C.korshinskii and H.rhamnoides,respectively.Individual stemflow increased in a linear function with increasing rainfall depth.The relationship between funneling ratios and rainfall suggested that there existed a rainfall depth threshold of 11 mm for both C.korshinskii and H.rhamnoides.Averaged funneling ratios were 156.6±57.1 and49.5±30.8 for C.korshinskii and H.rhamnoides,respectively,indicating that the canopy architecture of the two shrubs was an effective funnel to channel stemflow to the root area,and C.korshinskii showed a greater potential to use stemflow water in the semi-arid conditions.For individual rainfall events,the wetting front depths were approximately 2 times deeper in the rooting zone around the stems than in the bare area outside canopy for both C.korshinskii and H.rhamnoides.Correspondingly,soil water content was also significantly higher in the root area around the shrub stem than in the area outside the shrub canopy.This confirms that shrub stemflow conserved in the deep soil layers may be an available moisture source for plant growth under semi-arid conditions. | ShengQi JIAN ChuanYan ZHAO ShuMin FANG Kai YU | 2014 | Journal of Arid Land2014，6，1： | 6 |
| 5 | Important progress on the use of isotope techniques and methods in catchment hydrology显示文摘The use of isotope techniques and methods in catchment hydrology in the last 50 years has generated two major types of progress: (1) Assessment of the temporal variations of the major stocks and flows of water in catchments, from which the estimation of wa-ter residence times is introduced in this paper. (2) Assessment of catchment hydrologic processes, in which the interactions be-tween different waters, hydrographical separation, and bio-geochemical process are described by using isotopes tracers. Future progress on isotope techniques and methods in hydrology is toward the understanding of the hydrological process in large river basins. Much potential also waits realization in terms of how isotope information may be used to calibrate and test distributed rainfall-runoff models and regarding aid in the quantification of sustainable water resources management. | JinKui Wu 1,2, YongJian Ding 1, BaiSheng Ye 1, QiYue Yang 3, Zhi Wei 1 1. Key Laboratory of Ecological Hydrology and Basin Sciences in Cold and Arid Regions Environmental and Engineering Re-search Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China. 2. Institute for Landscape Ecology and Resources Management, Justus-Liebig-University Giessen, Giessen 35392, Germany. 3. College of Earth and Environmental Science, Lanzhou University, Lanzhou, Gansu 730000, China. | 2009 | Research in Cold and Arid Regions2009，1，3： | 4 |
| 6 | Fingerprinting the sources of water-mobilized sediment threatening agricultural and water resource sustainability:Progress, challenges and prospects in China显示文摘Sediment source fingerprinting apportions the sources of sediment produced by water erosion by linking sampled sediment mixtures and landscape source materials using diagnostic and conservative fingerprints.Using this approach,the nature and location of active sediment sources across the catchment can be elucidated,generating information which is a key prerequisite for the design and implementation of catchment management strategies.The science of sediment source fingerprinting continues to attract much research globally,but to date,there have been relatively few fingerprinting studies in China.Here,there remain major challenges for the fingerprinting approach arising from the uniqueness of Chinese landscapes,including for instance,the complex land use configuration with highly fragmented or mosaic patches and the highly dynamic land use conversion rates,generating a need to test the physical basis for the discriminatory power and environmental behavior of both traditional and novel tracers.Future research is needed to investigate the applicability of tracer properties in different physiographic settings and to evaluate the potential strategic utility of the approach for supporting the improved management of soil and water sustainability.Here,the strategic availability of independent observation data for different components of catchment sediment budgets and well-maintained research infrastructure for plots,micro-catchments and drainage basins provides immediate opportunity for testing the approach and refining procedures.Such detailed testing across scales would be invaluable for promoting sediment source fingerprinting as both a scientific and management tool for informing soil and water conservation practices in China. | Qiang TANG Bojie FU Anbang WEN Xinbao ZHANG Xiubin HE Adrian LCOLLINS | 2019 | Science China Earth Sciences2019，62，12： | 4 |
| 7 | Assessing effects of “source-sink” landscape on non-point source pollution based on cell units of a small agricultural catchment显示文摘Ascertaining the relationship between 'source-sink' landscape and non-point source(NPS) pollution is crucial for reducing NPS pollution, however, it is not easy to realize this target on cell unit scale. To reveal the relationships between 'sourcesink' landscape and NPS pollution based on cell units of a small catchment in the Three Gorges Reservoir Region(TGRR), the runoff and nutrient yields were simulated first by rainfall events on a cell unit scale based on the Annualized AGricultural Non-Point Source Pollution Model(AnnAGNPS). Landscape structure and pattern were quantified with 'sourcesink' landscape indicators based on cell units including landscape area indices and locationweighted landscape indices. The results showed that:the study case of small Wangjiagou catchment highlighted a good prediction capability of runoff and nutrient export by the AnnAGNPS model. Throughout the catchment, the spatial distribution trends of four location-weighted landscape indices were similar to the trends of simulated total nitrogen(TN) and total phosphorus(TP), which highlighted the importance of spatial arrangement of 'source' and 'sink' landscape types in a catchment when estimating pollutant loads. Results by Pearson correlation analysis indicated that the location-weighted landscape index provided a more comprehensive account of multiple factors, and can better reflect NPS-related nutrient loss than other landscape indices applied in single-factor analysis. This study provides new findings for applying the 'source-sink' landscape indices based on cell units in small catchments to explain the effect of 'source-sink' landscape on nutrient export based on cell unit, and helps improve the understanding of the correlation between 'source-sink' landscape and NPS pollution. | WANG Jin-liang CHEN Cheng-long NI Jiu-pai XIE De-ti GUO Xi LUO Zhi-jun ZHAO Yue | 2019 | Journal of Mountain Science2019，16，9： | 3 |
| 8 | APPLICATION OF THE TRRL FLOOD ESTIMATION MODEL IN HYDROLOGICAL FORECASTING FOR CATCHMENTS WITH LIMITED DATA-A CASE STUDY显示文摘1INTRODUCTIONOnthemorningof30thJanuary1992,aNairobiboundpasengertrainfromMombasaonthemainlinederailedintoanembankmentthathadb... | OTIENO,F.A.O 1 and KIBATA,N. 2 | 1998 | International Journal of Sediment Research1998，13，4： | 3 |
| 9 | Eco-environment evolvement analysis of Ertan reservoir catchment based on remote sensing显示文摘Hydropower project may bring with it social-economic profits as well as side effects.The built dam and reservoir often cause some problems to the surrounding areas,among which the ecological and environmental effects caused by hydropower projects are always concerned by the public.In this article,we take the Ertan reservoir catchment as the research area and try to quantitatively analyze the variation of vegetation cover and soil erosion by remote sensing technique,and to comprehensively assess the evolvement and development trend of reservoir catchment.Soil erosion,land use/cover are used as ecological and environmental indicators which reflect the changes before,after and in the period of the construction of Ertan hydropower station.Supported by the multi-source remote sensing data(from satellite Landsat and CBERS) and DEM data,the land use/cover is interpreted through RS images which are classified both by unsupervised and supervised method,and the driving factors of the ecological changes are also analyzed.At the same time,the changes of soil loss are also monitored and analyzed during flood seasons of Ertan reservoir area before and after reservoir impoundment(1995,2000 and 2005) using the revised universal soil loss equation(RUSLE) .The results show that during the recent 13 years the arable land area has decreased obviously,and construction area and water surface have increased slightly.The increase of vegetation cover has some relations with the implementation of local ecological projects,i.e.,de-farming to forestry and de-farming to pasture projects.At the same time,changes may also be caused by the climate adjustment in the reservoir area.In the ten years from 1995 to 2005,the high soil loss classes were transforming to lowly level classes continuously.All of these show that the soil loss of Ertan reservoir area is getting better. | PANG ZhiGuo ,GE DeXiang & FU Jun E State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,,China Institute of Water Resources and Hydropower Research,Beijing 100048,China | 2011 | Science China(Technological Sciences)2011，54，S1： | 3 |
| 10 | Cloud Data and Computing Services Allow Regional Environmental Assessment:A Case Study of Macquarie-Castlereagh Basin, Australia显示文摘Large amounts of data at various temporal and spatial scales require terabyte(TB) level storage and computation, both of which are not easy for researchers to access. Cloud data and computing services provide another solution to store, process, share and explore environmental data with low costs, stronger computation capacity and easy access. The purpose of this paper is to examine the benefits and challenges of using freely available satellite data products from Australian Geoscience DataCube and Google Earth Engine(GEE) online data with time series for integrative environmental analysis of the Macquarie-Castlereagh Basin in the last 15 years as a case study. Results revealed that the cloud platform simplifies the procedure of traditional catalog data processing and analysis. The integrated analysis based on the cloud computing and traditional methods represents a great potential as a low-cost, efficient and user-friendly method for global and regional environmental study. The user can save considerable time and cost on data integration. The research shows that there is an excellent promise in performing regional environmental analysis by using a cloud platform. The incoming challenge of the cloud platform is that not all kinds of data are available on the cloud platform. How data are integrated into a single platform while protecting or recognizing the data property, or how one portal can be used to explore data archived on different platforms represent considerable challenges. | WU Hantian ZHANG Lu ZHANG Xin | 2019 | Chinese Geographical Science2019，29，3： | 2 |
| 11 | Implications of denitrification in the ecological status of an urban river using enzymatic activities in sediments as an indicator显示文摘A better understanding of the effects of a number of environmental factors on denitrification is vital for analyzing its role as nitrogen sink and providing deeper knowledge about the ecological status of a nitrate-rich ecosystem. Since few studies have addressed the occurrence and implications of denitrification in river sediments, and complexity of interactions among all these environmental factors makes comprehension of the process difficult, the potential of sediments from the Deba River to attenuate nitrate excess through denitrification was investigated. For this purpose, we adapted an in vitro method to measure activities of two enzymes contributing to the entire multiple-step nitrate reduction: Nitrate Reductase and Nitrite Reductase. The environmental features that influence both or single enzymatic activities were identified as oxygen availability,regulated directly by the moisture content or indirectly through the aerobic respiration,organic matter and nitrate content of sediments, and electrical conductivity and exchangeable sodium percentage of water. Additionally, our results showed that Nitrate Reductase catalyzes the principal limiting step of denitrification in sediments. Therefore,taking this enzymatic activity as an indicator, the southern part of the Deba River catchment presented low potential to denitrify but nitrate-limited sediments, whereas the middle and northern parts were characterized by high denitrification potential but nitraterich sediments. In general, this study on denitrifying enzymatic activities in sediments evaluates the suitability of the management of the effluents from wastewater treatment plants and municipal sewages to ensure a good ecological status of the Deba River. | Jessica Unda-Calvo Miren Martínez-Santos Estilita Ruiz-Romera Juan Luis Lechuga-Crespo | 2019 | Journal of Environmental Sciences2019，31，1： | 2 |
| 12 | STUDY ON THE CHARACTERISTICS OF LONG TERM DISCHARGE OF A CATCHMENT显示文摘In this study, the characteristics of the long term discharge of a terraced paddy field catchment are studied. Two kind of tank models are proposed and used to simulate the discharge of the catchment. The results of the model simulations are analyzed and compared with those of a forest catchment. | Hong, Lin Takase, Keiji Sato, Koichi | 2000 | Journal of Hydrodynamics2000，12，2： | 1 |
| 13 | Analysis on the long term discharge of a catchment显示文摘In this study, the characteristics of the long term discharge of a Terraced Paddy Field Catchment are studied. 2 Kind of Tank Models are proposed and used to simulate the discharge of the catchment. The characteristics of the model simulations of the discharge of the catchment are analyzed and compared with those of a forest catchment. | HONG Lin 1, TAKASE Keiji 2, SATO Koichi 2 (1. Wuhan University of Hydraulic and Electric Engineering, Wuhan 430072, China 2. Ehime University, Japan) | 2000 | Journal of Environmental Sciences2000，12，3： | 1 |
| 14 | Discharge Water Quality Models of Storm Runoff in a Catchment显示文摘The relationships between the water qualities of nitrogen and phosphorous contents in the discharge water and the discharge of storm runoff of an experimental catchment including terraced paddy field are analyzed based on experiment results of the catchment. By summarizing the currently related research on water quality models, the water quality models of different components of storm runoff of the catchment are presented and verified with the experiment data of water quality analyses and the corresponding discharge of the storm runoffs during 3 storms. Through estimating the specific discharge of storm runoff, the specific load of different components of nitrogen and phosphorus in the discharge water of the catchment can be forecasted by the models. It is found that the mathematical methods of linear regression are very useful for analysis of the relationship between the concentrations of nitrogen and phosphorus and the water discharge of storm runoff. It is also found that the most content of the nitrogen (75%) in the discharge water is organic, while half of the content (49%) of phosphorus in the discharge water is inorganic. | Hong Lin College of Water Resources and Hydropower, Wuhan University, Wuhan 430072, Hubei, China | 2002 | Wuhan University Journal of Natural Sciences2002，7，3： | 1 |
| 15 | ELEMENT COMPOSITION AND INFLUENCING FACTORS OF SUSPENDED MATTER IN LOWER REACHES OF HUANGHE, CHANGJIANG AND ZHUJIANG RIVERS显示文摘As suspended matter in rivers derived from weathered rocks and soils is the product of weathering and soil formation process in the catchment basin, its element composition plays a key role in ascertaining the weathering process and regional geology in the area. The Huanghe, Changjiang and Zhujiang are the major rivers in China which empty directly into the sea. Since the sum of their catchment area amounts to 88% of the total exterior drainage of China, the chemical composition of | 屈翠辉 郑建勋 杨绍晋 钱琴芳 杨亦男 | 1985 | Chinese Science Bulletin1985，30，8： | 1 |
| 16 | 德国农业低地流域土地利用格局的空间解释变量的定量识别分析(英文)显示文摘Land use patterns arise from interactive processes between the physical environment and anthropogenic activities.While land use patterns and the associated explanatory variables have often been analyzed on the large scale,this study aims to determine the most important variables for explaining land use patterns in the 50 km^2 catchment of the Kielstau,Germany,which is dominated by agricultural land use.A set of spatially distributed variables including topography,soil properties,socioeconomic variables,and landscape indices are exploited to set up logistic regression models for the land use map of 2017 with detailed agricultural classes.Spatial validation indicates a reasonable performance as the relative operating characteristic (ROC) ranges between 0.73 and 0.97 for all land use classes except for corn (ROC = 0.68).The robustness of the models in time is confirmed by the temporal validation for which the ROC values are on the same level (maximum deviation 0.1).Non-agricultural land use is generally better explained than agricultural land use.The most important variables are the share of drained area,distance to protected areas,population density,and patch fractal dimension.These variables can either be linked to agriculture or the river course of the Kielstau. | 雷超桂 Paul D.WAGNER Nicola FOHRER | 2019 | Journal of Geographical Sciences2019，29，11： | 1 |
| 17 | Assessment of future climate change impacts on hydrological behavior of Richmond River Catchment显示文摘This study evaluated the impacts of future climate change on the hydrological response of the Richmond River Catchment in New South Wales(NSW), Australia, using the conceptual rainfall-runoff modeling approach(the Hydrologiska Byrans Vattenbalansavdelning(HBV)model). Daily observations of rainfall, temperature, and streamflow and long-term monthly mean potential evapotranspiration from the meteorological and hydrological stations within the catchment for the period of 1972 e2014 were used to run, calibrate, and validate the HBV model prior to the streamflow prediction. Future climate signals of rainfall and temperature were extracted from a multi-model ensemble of seven global climate models(GCMs) of the Coupled Model Intercomparison Project Phase 3(CMIP3) with three regional climate scenarios, A2, A1 B,and B1. The calibrated HBV model was then forced with the ensemble mean of the downscaled daily rainfall and temperature to simulate daily future runoff at the catchment outlet for the early part(2016 e2043), middle part(2044 e2071), and late part(2072 e2099) of the 21 st century.All scenarios during the future periods present decreasing tendencies in the annual mean streamflow ranging between 1% and 24.3% as compared with the observed period. For the maximum and minimum flows, all scenarios during the early, middle, and late parts of the century revealed significant declining tendencies in the annual mean maximum and minimum streamflows, ranging between 30% and 44.4% relative to the observed period. These findings can assist the water managers and the community of the Richmond River Catchment in managing the usage of future water resources in a more sustainable way. | Hashim Isam Jameel Al-Safi Priyantha Ranjan Sarukkalige | 2017 | Water Science and Engineering2017，10，3： | 1 |
| 18 | STUDY ON AFFORESTATION TECHNIQUE OF DROUGHT RESISTANCE BY RUNOFF CATCHMENT显示文摘The catchment of runoff which improves the moisture content condition in tree holes isof great improtance to the development of the afforestation in arid and semi-arid regions.The crux of this technique is the soil water content which influnences the survial rates, | Ding Xueru ZhaoKechang Research Center of Arid Land Afforestation of Gansu province | 1993 | 干旱区资源与环境1993，7，Z1： | 0 |
| 19 | Simulation of denitrification in groundwater from Chaohu Lake Catchment,China显示文摘The eutrophication of Chaohu Lake in China is mainly attributed to nitrate inflow from non-point sources in the lake catchment. In this study,biological nitrate reduction from groundwater in the Chaohu Lake Catchment was investigated under laboratory conditions in a continuous upflow reactor. Sodium acetate served as the carbon source and electron donor. Results showed that a carbon-to-nitrogen(C/N) molar ratio of 3:1 and hydraulic retention time(HRT) of 8 d could achieve the most rapid nitrate nitrogen(NO_3^--N) depletion(from 100 mg/L to 1 mg/L within120 h). This rate was confirmed when field groundwater was tested in the reactor, in which a NO_3^--N removal rate of 97.71% was achieved(from60.35 mg/L to 1.38 mg/L within 120 h). Different levels of the initial NO_3^--N concentration(30, 50, 70, and 100 mg/L) showed observable influence on the denitrification rates, with an overall average NO_3^--N removal efficiency of 98.25% at 120 h. Nitrite nitrogen(NO_2^--N)accumulated in the initial 12 h, and then kept decreasing, until it reached 0.0254 mg/L at 120 h. Compared with the initial value, there was a slight accumulation of 0.04 mg/L for the ammonia nitrogen(NH4-N) concentration in the effluent, which is, however, less than the limit value.These results can provide a reference for evaluating performance of denitrification in situ. | Jia-zhong Qian Xiu-xuan Wang Lei Ma Long-ping Wang Jian-kui Liu Zhang-xian Yang | 2018 | Water Science and Engineering2018，11，2： | 0 |
| 20 | Coupled modeling of rainfall-induced floods and sediment transport at the catchment scale显示文摘Rainfall-induced floods may trigger intense sediment transport on erodible catchments, especially on the Loess Plateau in China, which in turn modifies the floods. However, the role of sediment transport in modifying floods has to date remained poorly understood. Concurrently, traditional hydrodynamic models for rainfall-induced floods typically ignore sediment transport, which may lead to inaccurate results for highly erodible catchments. Here, a two-dimensional(2 D) coupled shallow water hydro-sedimentmorphodynamic(SHSM) model, based on the Finite Volume Method on unstructured meshes and parallel computing, is proposed and applied to simulate rainfall-induced floods in the Zhidan catchment on the Loess Plateau, Shaanxi Province, China. For six historical floods of return periods up to 2 years, the numerical results compare well with observations of discharge hydrographs at the catchment outlet. The computed runoff-sediment yield relation is quantitatively reasonable as compared with other catchments under similar geographical conditions. It is revealed that neglecting sediment transport leads to underestimation of peak discharge of the flood by 14%-45%, whilst its effect on the timing of the peak discharge varies for different flood events. For 18 design floods with return periods of 10-500 years, sediment transport may lead to higher peak discharge by around 9%-15%. The temporal pattern of concentrated rainfall in a short period may lead to a larger exponent value of the power function for the runoff-sediment yield relation. The current finding leads us to propose that incorporating sediment transport in rainfallinduced flood modeling is warranted. The SHSM model is applicable to flood and sediment modeling at the catchment scale in support of risk management and water and soil management. | Ronglan Huang Yufang Ni Zhixian Cao | 2022 | International Journal of Sediment Research2022，37，6： | 0 |
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