{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T00:37:46Z","timestamp":1792197466762,"version":"4.4.0"},"reference-count":69,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2019,1,28]],"date-time":"2019-01-28T00:00:00Z","timestamp":1548633600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["41371280"],"award-info":[{"award-number":["41371280"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["41771319"],"award-info":[{"award-number":["41771319"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>Gully erosion is a serious environmental problem worldwide, causing soil loss, land degradation, silting up of reservoirs and even catastrophic flooding. Mapping gully features from remote sensing imagery is crucial for assisting in understanding gully erosion mechanisms, predicting its development processes and assessing its environmental and socio-economic effects over large areas, especially under the increasing global climate extremes and intensive human activities. However, the potential of using increasingly available high-resolution remote sensing imagery to detect and delineate gullies has been less evaluated. Hence, 130 gullies occurred along a transect were selected from a typical watershed in the hilly and gully region of the Chinese Loess Plateau, and visually interpreted from a Pleiades-1B satellite image (panchromatic-sharpened image at 0.5 m resolution fused with 2.0 m multi-spectral bands). The interpreted gullies were compared with their measured data obtained in the field using a differential global positioning system (GPS). Results showed that gullies could generally be accurately interpreted from the image, with an average relative error of gully area and gully perimeter being 11.1% and 8.9%, respectively, and 74.2% and 82.3% of the relative errors for gully area and gully perimeter were within 15%. But involving field measurements of gullies in present imagery-based gully studies is still recommended. To judge whether gullies were mapped accurately further, a standard adopting one-pixel tolerance along the mapped gully edges was proposed and proved to be practical. Correlation analysis indicated that larger gullies could be interpreted more accurately but increasing gully shape complexity would decrease interpreting accuracy. Overall lower vegetation coverage in winter due to the withering and falling of vegetation rarely affected gully interpreting. Furthermore, gully detectability on remote sensing imagery in this region was lower than the other places of the world, due to the overall broken topography in the Loess Plateau, thus images with higher resolution than normally perceived are needed when mapping erosion features here. Taking these influencing factors (gully dimension and shape complexity, vegetation coverage, topography) into account will be favorable to select appropriate imagery and gullies (as study objects) in future imagery-based gully studies. Finally, two linear regression models were built to correct gully area (Aip, m2) and gully perimeter (Pip, m) visually extracted, by connecting them with the measured area (Ams, m2) and perimeter (Pms, m). The correction models were      A  m s   = 1.021  A  i p    +   0.139      and      P  m s   =  0.949   P  i p    + \u00a0   0.722     , respectively. These models could be helpful for improving the accuracy of interpreting results, and further accurately estimating gully development and developing more effective automated gully extraction methods on the Loess Plateau of China.<\/jats:p>","DOI":"10.3390\/ijerph16030369","type":"journal-article","created":{"date-parts":[[2019,1,29]],"date-time":"2019-01-29T03:40:55Z","timestamp":1548733255000},"page":"369","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Accuracy Assessment of the Planar Morphology of Valley Bank Gullies Extracted with High Resolution Remote Sensing Imagery on the Loess Plateau, China"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7710-580X","authenticated-orcid":false,"given":"Yixian","family":"Chen","sequence":"first","affiliation":[{"name":"State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China"},{"name":"University of Chinese Academy of Sciences, Beijing 100049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juying","family":"Jiao","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China"},{"name":"Institute of Soil and Water Conservation, Northwest A&amp;F University, Yangling 712100,  China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanhong","family":"Wei","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China"},{"name":"University of Chinese Academy of Sciences, Beijing 100049, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hengkang","family":"Zhao","sequence":"additional","affiliation":[{"name":"Institute of Soil and Water Conservation, Northwest A&amp;F University, Yangling 712100,  China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weijie","family":"Yu","sequence":"additional","affiliation":[{"name":"Institute of Soil and Water Conservation, Northwest A&amp;F University, Yangling 712100,  China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Binting","family":"Cao","sequence":"additional","affiliation":[{"name":"Institute of Soil and Water Conservation, Northwest A&amp;F University, Yangling 712100,  China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haiyan","family":"Xu","sequence":"additional","affiliation":[{"name":"Institute of Soil and Water Conservation, Northwest A&amp;F University, Yangling 712100,  China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fangchen","family":"Yan","sequence":"additional","affiliation":[{"name":"Institute of Soil and Water Conservation, Northwest A&amp;F University, Yangling 712100,  China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Duoyang","family":"Wu","sequence":"additional","affiliation":[{"name":"Institute of Soil and Water Conservation, Northwest A&amp;F University, Yangling 712100,  China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hang","family":"Li","sequence":"additional","affiliation":[{"name":"Institute of Soil and Water Conservation, Northwest A&amp;F University, Yangling 712100,  China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2019,1,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"462","DOI":"10.1016\/j.geomorph.2014.10.005","article-title":"Assessment of bank gully development and vegetation coverage on the Chinese Loess Plateau","volume":"228","author":"Li","year":"2015","journal-title":"Geomorphology"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"91","DOI":"10.1016\/S0341-8162(02)00143-1","article-title":"Gully erosion and environmental change: Importance and research needs","volume":"50","author":"Poesen","year":"2003","journal-title":"Catena"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"22","DOI":"10.1002\/ldr.1094","article-title":"Mapping linear erosion features using high and very high resolution satellite imagery","volume":"24","author":"Desprats","year":"2013","journal-title":"Land Degrad. Dev."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"132","DOI":"10.1016\/j.catena.2005.06.001","article-title":"Gully erosion: Impacts, factors and control","volume":"63","author":"Valentin","year":"2005","journal-title":"Catena"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"43","DOI":"10.1016\/S0341-8162(01)00170-9","article-title":"Holocene environmental change in the Otjiwarongo thornbush savanna (Northern Namibia): Evidence from soils and sediments","volume":"47","author":"Eitel","year":"2002","journal-title":"Catena"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"230","DOI":"10.1016\/j.catena.2006.05.007","article-title":"Analysis of the influence of gully erosion in the flow pattern of catchment streams, Southeastern Brazil","volume":"69","author":"Costa","year":"2007","journal-title":"Catena"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"327","DOI":"10.1016\/S0169-555X(02)00220-9","article-title":"Sediment yield variability in Spain: A quantitative and semiqualitative analysis using reservoir sedimentation rates","volume":"50","author":"Verstraeten","year":"2003","journal-title":"Geomorphology"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"9","DOI":"10.1006\/jare.1999.0618","article-title":"Soil and water loss from the Loess Plateau in China","volume":"45","author":"Shi","year":"2000","journal-title":"J. Arid Environ."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"157","DOI":"10.1177\/030913339702100201","article-title":"Erosion, flooding and channel management in Mediterranean environments of southern Europe","volume":"21","author":"Poesen","year":"1997","journal-title":"Prog. Phys. Geogr."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1016\/S0169-555X(99)00109-9","article-title":"Characteristics and controlling factors of bank gullies in two semi-arid mediterranean environments","volume":"33","author":"Vandekerckhove","year":"2000","journal-title":"Geomorphology"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"288","DOI":"10.1016\/j.geomorph.2010.01.009","article-title":"Comparison of gully erosion estimates using airborne and ground-based LiDAR on Santa Cruz Island, California","volume":"118","author":"Perroy","year":"2010","journal-title":"Geomorphology"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"107","DOI":"10.1016\/S0167-1987(02)00132-0","article-title":"Evaluating gully erosion using 137Cs and 210Pb\/137Cs ratio in a reservoir catchment","volume":"69","author":"Li","year":"2003","journal-title":"Soil Tillage Res."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"128","DOI":"10.1016\/j.catena.2006.03.005","article-title":"Accuracy of methods for field assessment of rill and ephemeral gully erosion","volume":"67","author":"Loizu","year":"2006","journal-title":"Catena"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1016\/S0341-8162(99)00013-2","article-title":"Ephemeral gully erosion in southern Navarra (Spain)","volume":"36","author":"Casali","year":"1999","journal-title":"Catena"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"131","DOI":"10.1016\/S0341-8162(03)00061-4","article-title":"Modelling gully erosion for a small catchment on the Chinese Loess Plateau","volume":"54","author":"Hessel","year":"2003","journal-title":"Catena"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"S113","DOI":"10.1007\/s11069-015-1732-8","article-title":"Gully development in eastern Romania: A case study from Falciu Hills","volume":"79","author":"Ionita","year":"2015","journal-title":"Nat. Hazards"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1319","DOI":"10.2136\/sssaj2011.0390","article-title":"Comparing the Accuracy of Several Field Methods for Measuring Gully Erosion","volume":"76","author":"Castillo","year":"2012","journal-title":"Soil Sci. Soc. Am. J."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"119","DOI":"10.1006\/bioe.2002.0092","article-title":"Ephemeral gully erosion in a wheat-cultivated area in Sicily (Italy)","volume":"83","author":"Capra","year":"2002","journal-title":"Biosyst. Eng."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"154","DOI":"10.1016\/j.catena.2005.06.002","article-title":"Monitoring of gully erosion on the Loess Plateau of China using a global positioning system","volume":"63","author":"Wu","year":"2005","journal-title":"Catena"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"132","DOI":"10.1016\/j.catena.2006.10.010","article-title":"Using LiDAR data to map gullies and headwater streams under forest canopy: South Carolina, USA","volume":"71","author":"James","year":"2007","journal-title":"Catena"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1016\/j.catena.2016.04.018","article-title":"A gully erosion assessment model for the Chinese Loess Plateau based on changes in gully length and area","volume":"148","author":"Li","year":"2017","journal-title":"Catena"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1701","DOI":"10.1002\/esp.4332","article-title":"Gully morphological characteristics in the loess hilly-gully region based on 3D laser scanning technique","volume":"43","author":"Wu","year":"2018","journal-title":"Earth Surf. Process. Landf."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"2723","DOI":"10.1080\/01431160600857469","article-title":"Automatic identification of erosion gullies with ASTER imagery in the Brazilian Cerrados","volume":"28","author":"Vrieling","year":"2007","journal-title":"Int. J. Remote Sens."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"24","DOI":"10.1016\/j.catena.2013.09.004","article-title":"Soil erosion in gully catchments affected by land-levelling measures in the Souss Basin, Morocco, analysed by rainfall simulation and UAV remote sensing data","volume":"113","author":"Peter","year":"2014","journal-title":"Catena"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.catena.2015.04.004","article-title":"Measuring gullies by synergetic application of UAV and close range photogrammetry\u2014A case study from Andalusia, Spain","volume":"132","author":"Stoecker","year":"2015","journal-title":"Catena"},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Wang, R., Zhang, S., Pu, L., Yang, J., Yang, C., Chen, J., Guan, C., Wang, Q., Chen, D., and Fu, B. (2016). Gully Erosion Mapping and Monitoring at Multiple Scales Based on Multi-Source Remote Sensing Data of the Sancha River Catchment, Northeast China. ISPRS Int. J. Geo-Inf., 5.","DOI":"10.3390\/ijgi5110200"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"1915","DOI":"10.1002\/esp.1868","article-title":"Accuracy of high-resolution photogrammetric measurements of gullies with contrasting morphology","volume":"34","author":"Gimenez","year":"2009","journal-title":"Earth Surf. Process. Landf."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1016\/j.catena.2005.10.005","article-title":"Satellite remote sensing for water erosion assessment: A review","volume":"65","author":"Vrieling","year":"2006","journal-title":"Catena"},{"key":"ref_29","unstructured":"Knight, J., Spencer, J.R., Brooks, A.P., and Phinn, S. (2007, January 21\u201325). Large-Area, High-Resolution Remote Sensing Based Mapping of Alluvial Gully Erosion in Australia\u2019s Tropical Rivers. Proceedings of the 5th Australian Stream Management Conference, Austrilian Rivers: Making a Difference, Albury, NSW, Australia."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"1319","DOI":"10.1002\/esp.3526","article-title":"Uncertainty assessment of ephemeral gully identification, characteristics and topographic threshold when using aerial photographs in agricultural settings","volume":"39","author":"Maugnard","year":"2014","journal-title":"Earth Surf. Process. Landf."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"143","DOI":"10.1016\/S0924-2716(98)00004-5","article-title":"Evaluating the information content of JERS-1 SAR and Landsat TM data for discrimination of soil erosion features","volume":"53","author":"Metternicht","year":"1998","journal-title":"ISPRS-J. Photogramm. Remote Sens."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"1167","DOI":"10.5194\/hess-14-1167-2010","article-title":"Identification and mapping of soil erosion areas in the Blue Nile, Eastern Sudan using multispectral ASTER and MODIS satellite data and the SRTM elevation model","volume":"14","author":"Kaab","year":"2010","journal-title":"Hydrol. Earth Syst. Sci."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"260","DOI":"10.1016\/j.geomorph.2011.07.003","article-title":"Object-based gully feature extraction using high spatial resolution imagery","volume":"134","author":"Shruthi","year":"2011","journal-title":"Geomorphology"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"283","DOI":"10.1016\/j.geomorph.2014.04.006","article-title":"Object-based gully system prediction from medium resolution imagery using Random Forests","volume":"216","author":"Shruthi","year":"2014","journal-title":"Geomorphology"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"262","DOI":"10.1016\/j.catena.2014.01.010","article-title":"Quantifying temporal changes in gully erosion areas with object oriented analysis","volume":"128","author":"Shruthi","year":"2015","journal-title":"Catena"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"761","DOI":"10.1109\/TGRS.2008.2009355","article-title":"Texture and Scale in Object-Based Analysis of Subdecimeter Resolution Unmanned Aerial Vehicle (UAV) Imagery","volume":"47","author":"Laliberte","year":"2009","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"79","DOI":"10.1016\/j.catena.2005.05.007","article-title":"The application of remote-sensing data to monitoring and modelling of soil erosion","volume":"62","author":"King","year":"2005","journal-title":"Catena"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1016\/j.isprsjprs.2009.06.004","article-title":"Object based image analysis for remote sensing","volume":"65","author":"Blaschke","year":"2010","journal-title":"ISPRS-J. Photogramm. Remote Sens."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"415","DOI":"10.1007\/s11769-017-0874-x","article-title":"An Object-based Approach for Two-level Gully Feature Mapping Using High-resolution DEM and Imagery: A Case Study on Hilly Loess Plateau Region, China","volume":"27","author":"Liu","year":"2017","journal-title":"Chin. Geogr. Sci."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"2002","DOI":"10.1002\/esp.3595","article-title":"The normalized topographic method: An automated procedure for gully mapping using GIS","volume":"39","author":"Castillo","year":"2014","journal-title":"Earth Surf. Process. Landf."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"876","DOI":"10.1002\/esp.1918","article-title":"High resolution quantification of gully erosion in upland peatlands at the landscape scale","volume":"35","author":"Evans","year":"2010","journal-title":"Earth Surf. Process. Landf."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"13","DOI":"10.1016\/j.geomorph.2018.04.011","article-title":"Large-scale mapping of gully-affected areas: An approach integrating Google Earth images and terrain skeleton information","volume":"314","author":"Liu","year":"2018","journal-title":"Geomorphology"},{"key":"ref_43","unstructured":"Vrieling, A., and Rodrigues, S.C. (2004, January 6\u201310). Erosion assessment in the Brazilian Cerrados using multi-temporal SAR imagery. Proceedings of the 2004 Envisat & ERS Symposium, Salzburg, Austria."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"185","DOI":"10.1016\/j.geomorph.2012.06.011","article-title":"Gully head retreat rates in the semi-arid highlands of Northern Ethiopia","volume":"173","author":"Frankl","year":"2012","journal-title":"Geomorphology"},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"329","DOI":"10.1016\/S0341-8162(02)00132-7","article-title":"Medium-term gully headcut retreat rates in Southeast Spain determined from aerial photographs and ground measurements","volume":"50","author":"Vandekerckhove","year":"2003","journal-title":"Catena"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"274","DOI":"10.1002\/ldr.2519","article-title":"Seed Removal due to Overland Flow on Abandoned Slopes in the Chinese Hilly Gullied Loess Plateau Region","volume":"28","author":"Yu","year":"2017","journal-title":"Land Degrad. Dev."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"427","DOI":"10.1016\/j.ecoleng.2016.06.030","article-title":"Seed population dynamics on abandoned slopes in the hill and gully Loess Plateau region of China","volume":"94","author":"Yu","year":"2016","journal-title":"Ecol. Eng."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"146","DOI":"10.1016\/j.foreco.2016.05.025","article-title":"The effect of Robinia pseudoacacia afforestation on soil and vegetation properties in the Loess Plateau (China): A chronosequence approach","volume":"375","author":"Kou","year":"2016","journal-title":"For. Ecol. Manag."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"11","DOI":"10.1016\/j.catena.2012.09.012","article-title":"The estimation of soil organic carbon distribution and storage in a small catchment area of the Loess Plateau","volume":"101","author":"Li","year":"2013","journal-title":"Catena"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"1899","DOI":"10.1002\/esp.4364","article-title":"Variation in the sediment deposition behind check-dams under different soil erosion conditions on the Loess Plateau, China","volume":"43","author":"Wei","year":"2018","journal-title":"Earth Surf. Process. Landf."},{"key":"ref_51","first-page":"9","article-title":"The Laws of Hillslope Channel Erosion Occurrence and Development on Loess Plateau","volume":"7","author":"Liu","year":"1988","journal-title":"Mem. NISWC Acad. Sin."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"2818","DOI":"10.1002\/esp.4435","article-title":"Mapping and spatial-temporal assessment of gully density in the Middle Volga region, Russia","volume":"43","author":"Golosov","year":"2018","journal-title":"Earth Surf. Process. Landf."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"109","DOI":"10.1016\/j.catena.2016.02.025","article-title":"Soil erosion resistance of \u201cGrain for Green\u201d vegetation types under extreme rainfall conditions on the Loess Plateau, China","volume":"141","author":"Wang","year":"2016","journal-title":"Catena"},{"key":"ref_54","first-page":"120","article-title":"Characteristics of gully development in Northern Shaanxi Hilly Loess Region before Grain-for-Green Programme (1976\u20131997)","volume":"33","author":"Chen","year":"2017","journal-title":"Trans. Chin. Soc. Agric. Eng."},{"key":"ref_55","first-page":"58","article-title":"Topographic characteristics of ephemeral gully erosion in loess hilly and gully region based on RS and GIS","volume":"26","author":"Qin","year":"2010","journal-title":"Trans. Chin. Soc. Agric. Eng."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"1672","DOI":"10.1002\/esp.3405","article-title":"Factors controlling the morphology and volume (V)-length (L) relations of permanent gullies in the northern Ethiopian Highlands","volume":"38","author":"Frankl","year":"2013","journal-title":"Earth Surf. Process. Landf."},{"key":"ref_57","doi-asserted-by":"crossref","unstructured":"Rouse, J.W., Haas, R.H., Schell, J.A., and Deering, D.W. (1973, January 10\u201314). Monitoring Vegetation Systems in the Great Plains with ERTS. Proceedings of the 3rd ERTS Symposium, Washington, DC, USA.","DOI":"10.1109\/TGE.1973.294284"},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"55","DOI":"10.1016\/S0168-1923(00)00195-7","article-title":"Spatial and temporal dynamics of vegetation in the San Pedro River basin area","volume":"105","author":"Qi","year":"2000","journal-title":"Agric. For. Meteorol."},{"key":"ref_59","unstructured":"Z\u00e4voianu, I. (1985). Morphometry of Drainage Basins, Elsevier."},{"key":"ref_60","unstructured":"Hadley, W. (2016). ggplot2: Elegant Graphics for Data Analysis, Springer."},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"254","DOI":"10.1016\/j.geomorph.2013.06.025","article-title":"Quantifying long-term changes in gully networks and volumes in dryland environments: The case of Northern Ethiopia","volume":"201","author":"Frankl","year":"2013","journal-title":"Geomorphology"},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"196","DOI":"10.1080\/17538947.2012.744777","article-title":"Transferring Google Earth observations to GIS-software: Example from gully erosion study","volume":"6","author":"Frankl","year":"2013","journal-title":"Int. J. Dig. Earth"},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"73","DOI":"10.1016\/j.catena.2018.05.044","article-title":"Combining field monitoring and aerial imagery to evaluate the role of gully erosion in a Mediterranean catchment (Tunisia)","volume":"170","author":"Raclot","year":"2018","journal-title":"Catena"},{"key":"ref_64","first-page":"138","article-title":"Study on gully erosion distribution in Northeast black soil areas based on Pleiades","volume":"48","author":"Chen","year":"2016","journal-title":"J. Northeast Normal Univ."},{"key":"ref_65","first-page":"267","article-title":"Timing of erosion and satellite data: A multi-resolution approach to soil erosion risk mapping","volume":"10","author":"Vrieling","year":"2008","journal-title":"Int. J. Appl. Earth Obs. Geoinf."},{"key":"ref_66","doi-asserted-by":"crossref","first-page":"215","DOI":"10.1016\/j.catena.2004.05.001","article-title":"An evaluation of methods to determine slope using digital elevation data","volume":"58","author":"Warren","year":"2004","journal-title":"Catena"},{"key":"ref_67","first-page":"646","article-title":"Classification of valley shoulder line in Loess Relief","volume":"30","author":"Xiao","year":"2007","journal-title":"Arid Land Geogr."},{"key":"ref_68","doi-asserted-by":"crossref","first-page":"48","DOI":"10.1016\/j.geomorph.2008.05.047","article-title":"The potential of 3D gully monitoring with GIS using high-resolution aerial photography and a digital photogrammetry system","volume":"111","author":"Marzolff","year":"2009","journal-title":"Geomorphology"},{"key":"ref_69","doi-asserted-by":"crossref","first-page":"813","DOI":"10.5194\/hess-13-813-2009","article-title":"Editorial \u2018Remote sensing in hydrological sciences\u2019","volume":"13","author":"Wagner","year":"2009","journal-title":"Hydrol. Earth Syst. Sci."}],"container-title":["International Journal of Environmental Research and Public Health"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1660-4601\/16\/3\/369\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T12:29:15Z","timestamp":1760185755000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1660-4601\/16\/3\/369"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,1,28]]},"references-count":69,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2019,2]]}},"alternative-id":["ijerph16030369"],"URL":"https:\/\/doi.org\/10.3390\/ijerph16030369","relation":{},"ISSN":["1660-4601"],"issn-type":[{"value":"1660-4601","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,1,28]]}}}