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Songtang He
Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, Chengdu, 610041, China

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Journal article
Published: 22 November 2018 in Land Use Policy
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Debris flow waste-shoal land (DFWSL) is a significant and potential land resource that is largely ignored in ecologically fragile mountainous areas. Yeyatang Basin, in Yunnan Province, China, is a typical mountainous debris flow area with a large amount of DFWSL. In order to achieve efficient use of DFWSL in this area, we built a demonstration plot and implemented a landscape ecological use pattern (LEUP) model for the DFWSL, with which we analyzed the economic, ecological, and social benefits. The results showed that the LEUP significantly improved incomes and vegetation coverage, and it reduced soil and water loss, controlled the debris flow, and ensured the safety of residents. To some extent, the LEUP alleviated the conflict between socioeconomic development and environmental protection and increased local employment opportunities, which could help to resolve the socioeconomic issues associated with rural hollow villages and left-behind children. The model demonstration results will provide a “road map” to wasteland use and serve as an important information resource for policymakers. Leaders should consider shifting their perspectives toward exploring land resources that had previously been deemed unavailable and pay more attention to the management and development of DFWSL, which could potentially enable the sustainable development of mountain ecosystems and economies, and enhance the prevention and control of natural disasters in mountainous regions.

ACS Style

Songtang He; Daojie Wang; Yong Li; Yingchao Fang; Huijuan Lan; Wenle Chen. Implementation of a landscape ecological use pattern model: Debris flow waste-shoal land use in the Yeyatang Basin, Yunnan Province, China. Land Use Policy 2018, 81, 483 -492.

AMA Style

Songtang He, Daojie Wang, Yong Li, Yingchao Fang, Huijuan Lan, Wenle Chen. Implementation of a landscape ecological use pattern model: Debris flow waste-shoal land use in the Yeyatang Basin, Yunnan Province, China. Land Use Policy. 2018; 81 ():483-492.

Chicago/Turabian Style

Songtang He; Daojie Wang; Yong Li; Yingchao Fang; Huijuan Lan; Wenle Chen. 2018. "Implementation of a landscape ecological use pattern model: Debris flow waste-shoal land use in the Yeyatang Basin, Yunnan Province, China." Land Use Policy 81, no. : 483-492.

Journal article
Published: 04 August 2018 in Sustainability
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Land use change is extremely sensitive to natural factors and human influence in active debris flow. It is therefore necessary to determine the factors that influence land use change. This paper took Wudu District, Gansu Province, China as a study area, and a systemic analysis of the transformational extent and rate of debris flow waste-shoal land (DFWSL) was carried out from 2005 to 2015. The results show that from 2005 to 2015, cultivated land resources transformed to other types of land; cultivated lands mainly transformed to grassland from 2005 to 2010 and construction land from 2010 to 2015. Moreover, the growth rate of construction land from 2005 to 2010 was only 0.11%, but increased to 6.87% between 2010 and 2015. The latter is more than 60 times the former. This increase was brought about by natural disasters (debris flow, earthquakes, and landslides) and anthropogenic factors (national policies or strategies), which acted as driving forces in debris flow area. The former determines the initial use type of the DFWSL while the latter only affects the direction of land use and transformation.

ACS Style

Songtang He; Daojie Wang; Yong Li; Peng Zhao. Land Use Changes and Their Driving Forces in a Debris Flow Active Area of Gansu Province, China. Sustainability 2018, 10, 2759 .

AMA Style

Songtang He, Daojie Wang, Yong Li, Peng Zhao. Land Use Changes and Their Driving Forces in a Debris Flow Active Area of Gansu Province, China. Sustainability. 2018; 10 (8):2759.

Chicago/Turabian Style

Songtang He; Daojie Wang; Yong Li; Peng Zhao. 2018. "Land Use Changes and Their Driving Forces in a Debris Flow Active Area of Gansu Province, China." Sustainability 10, no. 8: 2759.

Original article
Published: 24 July 2018 in Environmental Earth Sciences
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A series experiments are conducted to investigate the effects of streambed profile on the erosion and deposition of debris flows. It is found that straight channel can increase the run out of debris flows by 10–25%, compared to that of surfaces without channels, and that travel distance was positively correlated with the hydraulic radius of the channel. In addition, the presence of straight channels caused the volume of debris flow deposition to become normally distributed with respect to travel distance. In the case of curved channels, increases in the sinuosity index resulted in significant blockage and obstruction. In the deposition zone, the maximum deposition volume for a channel with a comparatively low sinuosity index (1.05) was < 50% of the minimum deposition volume for a straight channel. Furthermore, the channel curvature affected not only the positions of deposition peaks along the travel distance but also the debris flow magnitudes in each unit interval (0.5 m). This study demonstrates the effects of differences in channel morphology on the erosional and depositional processes of gully debris flows. These findings are of significant importance for guiding debris flow risk assessment and for the restoration and reconstruction of downstream regions.

ACS Style

Songtang He; Daojie Wang; Shiqiu Chang; Yingchao Fang; Huijuan Lan. Effects of the morphology of sediment-transporting channels on the erosion and deposition of debris flows. Environmental Earth Sciences 2018, 77, 544 .

AMA Style

Songtang He, Daojie Wang, Shiqiu Chang, Yingchao Fang, Huijuan Lan. Effects of the morphology of sediment-transporting channels on the erosion and deposition of debris flows. Environmental Earth Sciences. 2018; 77 (14):544.

Chicago/Turabian Style

Songtang He; Daojie Wang; Shiqiu Chang; Yingchao Fang; Huijuan Lan. 2018. "Effects of the morphology of sediment-transporting channels on the erosion and deposition of debris flows." Environmental Earth Sciences 77, no. 14: 544.