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Province","award":["2023CXZX-125"],"award-info":[{"award-number":["2023CXZX-125"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The study of the classification and failure modes of Yellow River terrace landslides under the influence of irrigation projects is of key importance to alleviate the paradox between the rapid evolution of terrace landscapes caused by landslides and the survival of local residents. However, such studies remain controversial, despite it being widely recognized that a rise in groundwater level caused by irrigation is a key factor associated with landslide failure modes. In this paper, we take the Heitai terrace as a case study. Using aerial images and field investigations, we classify landslides in the Heitai loess layer into type A landslides (not related to groundwater) and type B1 and B2 landslides (related to groundwater). We analyze the failure modes and disaster-causing characteristics of each type of landslide, and our results indicate that the attenuation in soil strength is a key factor common to both type A and type B landslides, based on which type A landslides with small volume and short sliding distance are able to block the previous spring discharge, causing a rise in localized groundwater, which further contributes to type B landslides; the location of previous type B1 landslides with a large volume and long sliding distance and type A landslides may be more susceptible to type B2 landslides with a small volume and short sliding distance, where there are low confining pressures during the lower soil shear process. Therefore, we believe that the inevitable interaction effects between the failure modes of landslides during landslide evolution, which govern the geomorphological evolution of the Heitai terrace, are unavoidable. Combining these data with numerical analyses, we further demonstrate that a rise in groundwater level and discontinuous attenuation of soil strength caused by changes in soil properties during irrigation together control terrace landslides and their failure modes. From the results of interferometric synthetic aperture radar time-series monitoring of Yellow River terrace activity with and without irrigation projects, and electrical resistivity tomography groundwater detection, we conclude that in the future, Heitai terrace will continue to experience a high intensity of landslide activity, and conditions for the most catastrophic type of landslide (type B1) will remain, including the high localized groundwater caused by previous landslides, and the discontinuous attenuation of soil strength caused by the deterioration in soil properties. In this context, we believe that slope-cutting engineering will be one of the most economical means to achieve future landslide-type transformation on the Heitai terrace; this will mitigate the process of geomorphological evolution and improve the human living environment.<\/jats:p>","DOI":"10.3390\/rs15205012","type":"journal-article","created":{"date-parts":[[2023,10,18]],"date-time":"2023-10-18T10:36:56Z","timestamp":1697625416000},"page":"5012","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Effects of Irrigation Projects on the Classification of Yellow River Terrace Landslides and their Failure Modes: A Case Study of Heitai Terrace"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9453-393X","authenticated-orcid":false,"given":"Zonglin","family":"Zhang","sequence":"first","affiliation":[{"name":"School of Earth Sciences, Lanzhou University, Lanzhou 730000, China"},{"name":"Technology & Innovation Centre for Environmental Geology and Geohazards Prevention, Lanzhou 730000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Runqiang","family":"Zeng","sequence":"additional","affiliation":[{"name":"School of Earth Sciences, Lanzhou University, Lanzhou 730000, China"},{"name":"Technology & Innovation Centre for Environmental Geology and Geohazards Prevention, Lanzhou 730000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8969-033X","authenticated-orcid":false,"given":"Shufen","family":"Zhao","sequence":"additional","affiliation":[{"name":"School of Earth Sciences, Lanzhou University, Lanzhou 730000, China"},{"name":"Technology & Innovation Centre for Environmental Geology and Geohazards Prevention, Lanzhou 730000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3102-6193","authenticated-orcid":false,"given":"Xingmin","family":"Meng","sequence":"additional","affiliation":[{"name":"School of Earth Sciences, Lanzhou University, Lanzhou 730000, China"},{"name":"Technology & Innovation Centre for Environmental Geology and Geohazards Prevention, Lanzhou 730000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jianhua","family":"Ma","sequence":"additional","affiliation":[{"name":"Technology & Innovation Centre for Environmental Geology and Geohazards Prevention, Lanzhou 730000, China"},{"name":"College of Earth Environmental Sciences, Lanzhou University, Lanzhou 730000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hailong","family":"Yin","sequence":"additional","affiliation":[{"name":"School of Earth Sciences, Lanzhou University, Lanzhou 730000, China"},{"name":"Technology & Innovation Centre for Environmental Geology and Geohazards Prevention, Lanzhou 730000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhao","family":"Long","sequence":"additional","affiliation":[{"name":"School of Earth Sciences, Lanzhou University, Lanzhou 730000, China"},{"name":"Technology & Innovation Centre for Environmental Geology and Geohazards Prevention, Lanzhou 730000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,10,18]]},"reference":[{"key":"ref_1","first-page":"11","article-title":"Slope movement types and processes","volume":"176","author":"Varnes","year":"1978","journal-title":"Spec. 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