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| 1 | Quality of terrestrial data derived from UAV photogrammetry:A case study of Hetao irrigation district in northern China显示文摘Most crops in northern China are irrigated,but the topography affects the water use,soil erosion,runoff and yields.Technologies for collecting high-resolution topographic data are essential for adequately assessing these effects.Ground surveys and techniques of light detection and ranging have good accuracy,but data acquisition can be time-consuming and expensive for large catchments.Recent rapid technological development has provided new,flexible,high-resolution methods for collecting topographic data,such as photogrammetry using unmanned aerial vehicles(UAVs).The accuracy of UAV photogrammetry for generating high-resolution Digital Elevation Model(DEM)and for determining the width of irrigation channels,however,has not been assessed.A fixed-wing UAV was used for collecting high-resolution(0.15 m)topographic data for the Hetao irrigation district,the third largest irrigation district in China.112 ground checkpoints(GCPs)were surveyed by using a real-time kinematic global positioning system to evaluate the accuracy of the DEMs and channel widths.A comparison of manually measured channel widths with the widths derived from the DEMs indicated that the DEM-derived widths had vertical and horizontal root mean square errors of 13.0 and 7.9 cm,respectively.UAV photogrammetric data can thus be used for land surveying,digital mapping,calculating channel capacity,monitoring crops,and predicting yields,with the advantages of economy,speed and ease. | Hongming Zhang Jiangtao Yang Jantiene E.M.Baartman Shuqin Li Bei Jin Wenting Han Xiaomei Yang Lingtong Gai Coen J.Ritsema Violette Geissen | 2018 | International Journal of Agricultural and Biological Engineering2018，11，3： | 4 |
| 2 | Emerging pollutants in the environment:A challenge for water resource management显示文摘A significant number of emerging pollutants(EPs)resulting from point and diffuse pollution is present in the aquatic environment.These are chemicals that are not commonly monitored but have the potential to enter the environment and cause adverse ecological and human health effects.According to the NORMAN network,at least 700 substances categorized into 20 classes,have been identified in the European aquatic environment.In light of their potential impact action is urgently required.In this study,we present a concept that shows the current state of art and challenges for monitoring programs,fate and risk assessment tools and requirements for policies with respect to emerging pollutants as a base for sustainable water resource management.Currently,methods for sampling and analysis are not harmonized,being typically focused on certain EP classes.For a number of known highly hazardous EPs detection limits are too high to allow proper risk assessment.For other EPs such as microplastics method development is in its infancy.Advanced ultra-sensitive instrumental techniques should be used for quantitative determination of prioritized EPs in water,suspended matter,soil and biota.Data on EPs'and their metabolites'properties that determine their fate in the environment are often not available.National surveys on water quality often use different parameters for water quality assessment and often do not include EPs.A harmonized monitoring of surface and groundwater is not yet achieved and urgently required.Specific component integrated into models assessing the fate of EPs in a multi compartment environmental approach are missing and must be developed.The main goal of risk assessment is the overall protection of ecological communities in the aquatic environment and human health.New methods for assessing the cumulative risks from combined exposures to several stressors,including mixtures of EPs in a multi-scale approach are required.A combination of regulations and management measures with respect to use/emissions of EPs into the environment,as well as to their occurrence in the environment are fundamental to reach an efficient water resource management. | Violette Geissen Hans Mol Erwin Klumpp Günter Umlauf Marti Nadal Martine van der Ploeg Sjoerd E.A.T.M.van de Zee Coen J.Ritsema | 2015 | International Soil and Water Conservation Research2015，3，1： | 3 |
| 3 | Landfill Leachate Treatment by A Photoassisted Fenton Reaction 显示文摘 | Son-M Kim Geissen Sven U Alfons Vogelpohl | 1997 | Wat Sci Tech1997，35，4： | 1 |
| 4 | Separation of titanium dioxide from photocatalytically treated water by cross-flow microfiltration显示文摘 | Xi Weimin Geissen S U | 2001 | Wat Res2001，35，5： | 1 |
| 5 | Separation of titanium dioxide fromphotocatalytically treated water by cross-flow microfiltration显示文摘 | Xi W Geissen S U | 2001 | Water Research2001，35，： | 1 |
| 6 | On the linear elastic properties of regular and random opencell foams models显示文摘 | Van der Burg M W D Shulmeister V Van der Geissen E | 1997 | J Cell Plast1997，33，： | 1 |
| 7 | Separation of titanium didoxide from photoeatalytically treated water by cross-- flow microfiltration 显示文摘 | Xi W M Geissen S U | 2001 | Water and Research2001，35，： | 1 |
| 8 | Hydrodynamic optimization of a UV-cascade for the photochemical oxidation with H2 02 显示文摘 | Sprehe M Geissen S U Vogelpohl A | 2001 | Chemical Engineering & Technology2001，24，6： | 1 |
| 9 | On the linear elastic properties of regular and random open-cell foams models 显示文摘 | Van der Burg MWD Shulmeister V Van der Geissen E | 1997 | Journal of Cellular Plastics1997，33，： | 1 |
| 10 | On the linear elastic properties of regular and random open-cell foam models显示文摘 | VAN DER BURG M W D SHULMEISTER V VAN DER GEISSEN E | 1997 | Journal of Cellular Plastics1997，33，1： | 1 |
| 11 | Separation of titanium dioxide from photocatalytically treated water by cross-flow microfiltration 显示文摘 | Xi W Geissen S U 2001 | 2001 | Wat Res2001，35，： | 1 |
| 12 | Solar detoxification of wastewater in a novel aerated cascade photoreactor (ACP) 显示文摘 | Xi W Geissen S - U Vogelpohl A | 2001 | Wat Sci Techno12001，44，5： | 1 |
| 13 | Separation of titanium dioxide from photocatalytically treated water by cross-flow microfil- tration 显示文摘 | XI Weimin GEISSEN S U | 2001 | Water Research2001，35，5： | 1 |
| 14 | Selective removal of diclofenac from contaminated water using molecularly imprinted polymer microspheres 显示文摘 | DAI C M GEISSEN S U ZHANG Y L | 2011 | Environ Pollut2011，159，6： | 1 |
| 15 | Separation of titanium dioxide from photocatalytically treated water by cross-flow microfiltration显示文摘 | Weimin Xi Sven-uwe Geissen | 2001 | WatRes2001，35，5： | 1 |
| 16 | Chaetogammarus ischnus STEBBING jetzt auch im Mittellandkanal显示文摘 | Geissen H P | 1992 | Lauterbornia1992，12，： | 1 |
| 17 | Wa- ter use pattems and conservation in households of Wei River Ba- sin, China 显示文摘 | Fan L Liu G Wang F Geissen V Ritsema C J Tong Y | 2013 | Resource Conserv Recy2013，，7： | 1 |
| 18 | Landfill leachate treatment by a photoassisted Fenton reaction显示文摘 | Kim S M Geissen S U Vogelpohl A | 1997 | Water Science and Technology1997，35，4： | 1 |
| 19 | Separation of titanium dioxide from photocatalytically treated water by cross-flow microfiltration显示文摘 | XI W GEISSEN S U | 2001 | Water Research2001，35，5： | 1 |
| 20 | Carbamazepine and diclofenac: removal in wastewater treatment plants and occurrence in water bodies 显示文摘 | Zhang Y J Geissen S U Gal C | 2008 | Chemosphere2008，，： | 1 |
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