Estimating the optimal width of buffer strip for nonpoint source pollution control in the Three Gorges Reservoir Area, China

Shan, Nan; Ruan, Xinbo; Xu, Jing; Pan, Zharong

doi:10.1016/j.ecolmodel.2013.12.019

Cited by 34 publications

(16 citation statements)

References 56 publications

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“…The level plantation is another measure of soil erosion control, frequently used to reduce laminar erosion and increase soil water uptake. The level plantation can be successfully coupled with strip cropping [78] that involves the alternation of forages with strips of row crops, such as sugar cane. The control of soil erosion also comprises implementation of techniques that prevent soil compaction, such as no-tillage treatments [79], maintenance of crop residue to keep organic matter and nutrients in the topsoil, or more costly measures, such as terraces in level or gradient, since they reduce the ramp length reducing the surface drag of particles and nutrients [80].…”

Section: Discussionmentioning

confidence: 99%

A Regression Model of Stream Water Quality Based on Interactions between Landscape Composition and Riparian Buffer Width in Small Catchments

Pissarra

Valera

Costa

et al. 2019

Water

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Riparian vegetation represents a protective barrier between human activities installed in catchments and capable of generating and exporting large amounts of contaminants, and stream water that is expected to keep quality overtime. This study explored the combined effect of landscape composition and buffer strip width (L) on stream water quality. The landscape composition was assessed by the forest (F) to agriculture (A) ratio (F/A), and the water quality by an index (IWQ) expressed as a function of physico-chemical parameters. The combined effect (F/A × L) was quantified by a multiple regression model with an interaction term. The study was carried out in eight catchments of Uberaba River Basin Environmental Protection Area, located in the state of Minas Gerais, Brazil, and characterized by very different F/A and L values. The results related to improved water quality (larger IWQ values) with increasing values of F/A and L, which were not surprising given the abundant similar reports widespread in the scientific literature. But the effect of F/A × L on IWQ was enlightening. The interaction between F/A and L reduced the range of L values required to sustain IWQ at a fair level by some 40%, which is remarkable. The interaction was related to the spatial distribution of infiltration capacity within the studied catchments. The high F/A catchments should comprise a larger number of infiltration patches, allowing a dominance of subsurface flow widespread within the soil layer, a condition that improves the probability of soil water to cross and interact with a buffer strip before reaching the stream. Conversely, the low F/A catchments are prone to the generation of an overland flow network, because the absence of permanent vegetation substantially reduces the number of infiltration patches. The overland flow network channelizes runoff and conveys the surface water into specific confluence points within the stream, reducing or even hampering an interaction with a buffer strip. Notwithstanding the interaction, the calculated L ranges (45–175 m) are much larger than the maximum width imposed by the Brazilian Forest Code (30 m), a result that deserves reflection.

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Section: Discussionmentioning

confidence: 99%

A Regression Model of Stream Water Quality Based on Interactions between Landscape Composition and Riparian Buffer Width in Small Catchments

Pissarra

Valera

Costa

et al. 2019

Water

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“…Hence, proper management with sustainable land use in the catchment may alleviate degradation of the lake environment, such as to develop eco-agricultural mode and reasonable city planning. Meanwhile, in response to the high nutrient input, lately the establishment of buffer zones along the lakeshore and surrounding rivers has been found to be an effective and widely employed management tool in China [71,72].…”

Section: Implications For Lake Managementmentioning

confidence: 99%

Recent Sedimentation Rates of Shallow Lakes in the Middle and Lower Reaches of the Yangtze River: Patterns, Controlling Factors and Implications for Lake Management

Dong

Yang

et al. 2017

Water

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Significantly increased sedimentation rates (SRs) in lakes worldwide in recent decades due to higher inputs of silt and eutrophication have led to significant environmental problems such as lake size diminishment and degraded water quality. Many lakes in the middle and lower reaches of the Yangtze River basin (MLYB) have followed this pattern. For effective lake management, it is essential to understand the pattern and drivers of SRs in these lakes. Fourteen typical lakes in the MLYB were chosen to examine the spatiotemporal patterns of SRs and identify the drivers over different time periods. Since 1900, SRs increased from <0.2 to 0.3-0.6 g•cm −2 •year −1 , particularly notable during 1930-1990. Combined with climatic factors, SR correlated negatively with lake (catchment) size and abundance of aquatic vegetation, whereas other lake features including nutrient status did not contribute significantly to the variation in SRs, due to the fast decomposition processes of organic matter in shallow lakes. Detrimental land use practices especially reclamation for croplands and rapid urbanization was revealed to elevate SRs pronouncedly. We propose various management strategies aiming to maintain SR reference condition at~0.16 ± 0.08 g•cm −2 •year −1 , which is analogous to the SR value between 1850 and 1900.

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“…As for water source, Shanxi Reservoir has exceptionally high water quality requirements. Among the many management measures built into the SWAT model, the filtered zone is considered to be an effective measure to intercept sediment, nutrients, pesticides, and bacteria [17]. In this study, we sought the best pollutant interception solution by setting filter strips of different widths (1-10m).…”

Section: Swat Modelmentioning

confidence: 99%

Study of Nitrogen Pollution Simulation and Management Measures on SWAT Model in Typhoon Period of Shanxi Reservoir Watershed, Zhejiang Province, China

Chen¹,

Chen²,

Liu³

et al. 2021

Pol. J. Environ. Stud.

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In this study, the Shanxi Reservoir watershed, which is greatly affected by typhoons, is used as the research object, two daily scale SWAT models are established for the dry and wet seasons. Two different typhoon processes in 2007 and 2008 are selected to analyze the pollutant loads during the typhoon period and the reduction of the pollution loads by filter strips. This study focuses on the pollutant load during the typhoon and the reduction effect of management measures, proves seasonal modeling according to regional climate characteristics dramatically improves the accuracy of the model, broadens the perspective of watershed pollution prevention and control. The results show that: the pollutant output of the Shanxi Reservoir watershed is mainly agricultural land, and is positively correlated with precipitation and runoff; loads of organic nitrogen and nitrate nitrogen during typhoon 1 and typhoon 2 accounted for 22.18% and 9.14%, 22.53%, and 18.08% of the whole year, respectively. The pollution loads of typhoon 2 relative to typhoon 1 is relatively small; when the width of the filter strips reaches 3m, the reduction of ammonia nitrogen loads can reach more than 50%, which proves a visible effect on reducing pollutant loads during typhoons.

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Estimating the optimal width of buffer strip for nonpoint source pollution control in the Three Gorges Reservoir Area, China

Cited by 34 publications

References 56 publications

A Regression Model of Stream Water Quality Based on Interactions between Landscape Composition and Riparian Buffer Width in Small Catchments

A Regression Model of Stream Water Quality Based on Interactions between Landscape Composition and Riparian Buffer Width in Small Catchments

Recent Sedimentation Rates of Shallow Lakes in the Middle and Lower Reaches of the Yangtze River: Patterns, Controlling Factors and Implications for Lake Management

Study of Nitrogen Pollution Simulation and Management Measures on SWAT Model in Typhoon Period of Shanxi Reservoir Watershed, Zhejiang Province, China

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