Carbon retention by check dams: Regional scale estimation

Lü, Yihe; Sun, Ranhao; Fu, Bojie; Wang, Yafeng

doi:10.1016/j.ecoleng.2012.03.020

Cited by 59 publications

(14 citation statements)

References 39 publications

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“…Additionally, three bulk density samples were collected with cutting ring method and then taken to the laboratory for soil bulk density determination. Soil samples were air-dried, and sampled with four points, and then sieved by 100 meshes (Lü et al 2012). …”

Section: Sample Collectionmentioning

confidence: 99%

Vertical distribution characteristics of soil organic carbon content in Caohai wetland ecosystem of Guizhou plateau, China

Wang

Zhu

2015

J. For. Res.

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We selected four kinds of land use types from Caohai wetlands of Guizhou plateau (a total number of 32 soil profiles) to study the distribution characteristics of organic carbon content in soil. With different ways of land use, the organic carbon content of soil profiles and organic carbon density show the tendency of decreasing firstly and then increasing from top to bottom. With the increase of depth, the vertical difference becomes smaller first and then starts increasing. Land reclamation reduces the soil organic carbon content and density, changing its distribution structure in topsoil. The average content of organic carbon in Caohai wetlands are as follows: lake bed silt [ marsh wetland [ farmland [ woodland, the average organic carbon content of lake bed silt, marsh wetland, farmland and woodland are 16.40, 2.94, 1.81 and 1.08 %, respectively. Land reclamation reduces the organic carbon content of soil, therefore the conversion of cultivated lands to wetlands and the increase of forest coverage will help to fix the organic carbon in soil and increase its reserves.

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Section: Sample Collectionmentioning

confidence: 99%

Vertical distribution characteristics of soil organic carbon content in Caohai wetland ecosystem of Guizhou plateau, China

Wang

Zhu

2015

J. For. Res.

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“…Moreover, by retaining huge amounts of soil nutrients, it was found that check-dams can improve soil fertility, reduce food crises, and improve carbon sequestration, vegetation restoration, and climatic adaptation (Boix-Fayos et al 2009;Abedini et al 2012;Lü et al 2012). As a consequence, check dams were widely used to stabilize gullies and prevent downstream sediment deposition in many places around the world.…”

Section: Effect Of Check-dam Construction On Runoff and Sediment Redumentioning

confidence: 99%

Effect of rainfall variation and landscape change on runoff and sediment yield from a loess hilly catchment in China

et al. 2014

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The semiarid Chinese Loess Plateau is notorious for severe drought, water erosion, and environmental degradation. Changes in landscape patterns and rainfall are key drivers that determine the dynamics of runoff loss and sediment yield from catchments. These factors have crucial implications for management of other fragile ecosystems around the globe. In this study, responses of surface runoff and sediment yield to land use and rainfall in a typical loess hilly catchment in 1997, 2005, and 2010 were analyzed. Several major findings are highlighted. First, most rainfall occurred in the growing season from June to September and increased only slightly during the observation years. Second, runoff and soil transport rates at the catchment outlet from June to August were far greater than in other months. A similar trend was observed for seasonal rainfall occurrence, indicating that the intra-annual water erosion patterns were largely dominated by monthly rainfall distribution. Third, compared with the time period 1997-2005, mean runoff and sediment transport modulus in 2005-2010 declined significantly. This can be attributed mainly to changes in land use/land cover, i.e., increases in forests, shrubs, and grasses, and decreases in sloping farmlands. Dam construction is also key in controlling runoff and sediment yield, but more attention must be paid to its possible negative environmental effects. In general, our study indicates that marked changes in landscape patterns and vegetation coverage may contribute to long-term soil loss dynamics, and intra-annual rainfall variation mainly contributes to monthly variation in runoff and sediment yield.

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“…The most prominent land use change in the study area during the past two decades has been the agricultural expansion coming at the expense of natural and semi-natural land use including in grassland, woodland, and semi-shrubby desert. Numerous studies have focused on SOC due to its importance in global change (Lü et al 2012). These land use transitions have negative impacts on carbon sequestration by dryland ecosystems in the study area in terms of SOC (Table 2), which may induce soil quality deterioration and higher risks of wind erosion and desertification at local scales.…”

Section: Potential Ecological Risks Concerning Soc Changementioning

confidence: 99%

Effects of Land Use Change on Soil Carbon Storage and Water Consumption in an Oasis-Desert Ecotone

Lü

Zhao

et al. 2014

Environmental Management

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Land use and ecosystem services need to be assessed simultaneously to better understand the relevant factors in sustainable land management. This paper analyzed land use changes in the middle reach of the arid Heihe River Basin in northwest China over the last two decades and their impacts on water resources and soil organic carbon (SOC) storage. The results indicated that from 1986 to 2007: (1) cropland and human settlements expanded by 45.0 and 17.6 %, respectively, at the expense of 70.1, 35.7, and 4.1 % shrinkage on woodland, grassland, and semi-shrubby desert; (2) irrigation water use was dominant and increased (with fluctuations) at an average rate of 8.2 %, while basic human water consumption increased monotonically over a longer period from 1981 to 2011 at a rate of 58 %; and (3) cropland expansion or continuous cultivation led to a significant reduction of SOC, while the land use transition from grassland to semishrubby desert and the progressive succession of natural ecosystems such as semi-shrubby desert and grassland, in contrast, can bring about significant carbon sequestration benefits. The increased water consumption and decreased SOC pool associated with some observed land use changes may induce and aggravate potential ecological risks for both local and downstream ecosystems, including water resource shortages, soil quality declines, and degeneration of natural vegetation. Therefore, it is necessary to balance socioeconomic wellbeing and ecosystem services in land use planning and management for the sustainability of socio-ecological systems across spatiotemporal scales, especially in resource-poor arid environments.

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Carbon retention by check dams: Regional scale estimation

Cited by 59 publications

References 39 publications

Vertical distribution characteristics of soil organic carbon content in Caohai wetland ecosystem of Guizhou plateau, China

Vertical distribution characteristics of soil organic carbon content in Caohai wetland ecosystem of Guizhou plateau, China

Effect of rainfall variation and landscape change on runoff and sediment yield from a loess hilly catchment in China

Effects of Land Use Change on Soil Carbon Storage and Water Consumption in an Oasis-Desert Ecotone

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