Spatially explicit estimation of soil denitrification rates and land use effects in the riparian buffer zone of the large Guanting reservoir

Wang, Xuelei; Yang, Shengtian; Mannaerts, Chris M.; Gao, Yunfei; Jian-xia, Guo

doi:10.1016/j.geoderma.2009.01.026

Cited by 26 publications

(13 citation statements)

References 33 publications

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“…This region has a continental monsoon climate with an annual average temperature of 2-8 • C. The average annual precipitation and potential evaporation are 386.2 and 1652.3 mm, respectively [32]. Drought is followed by concentrated rainfall, sparse vegetation, loose soils, and frequent strong winds in winter and early spring, and inappropriate land-use practices in history have resulted in severe wind erosion and desertification in this region.…”

Section: Study Areamentioning

confidence: 99%

Responses of Soil Seed Bank and Vegetation to the Increasing Intensity of Human Disturbance in a Semi-Arid Region of Northern China

Xiao

Wang

et al. 2017

Sustainability

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Abstract:To provide more insights into the responses of the soil seed bank and vegetation to human disturbance intensity, we selected four land use types, including: native grassland (no human disturbance), abandoned artificial grassland (light human disturbance), artificial grassland (moderate human disturbance), and farmland (severe human disturbance) in a semi-arid climate of northern China. The species composition and density of the soil seed bank were measured, as well as the species composition and amount of vegetation. The native grassland had a significantly higher soil seed density and species richness than the other land use types. Moreover, the common species both in the soil seed bank and vegetation between the native grassland and other land use types gradually decreased as disturbance intensity increased. The abandoned artificial grassland and artificial grassland still had abundant soil seed banks according to their seed density (≥28.2% of the native grassland) and species richness (≥70.0% of the native grassland) to restore the vegetation. Conversely, it was hard to restore the vegetation on the farmland due to its low soil seed density (10.0% of the native grassland) and species richness (40.0% of the native grassland). In conclusion, human disturbance would generate significant negative effects on the soil seed bank in desertified regions in a semi-arid climate; however, the soil seed bank in land use types with light/moderate disturbance are more adapted to vegetation restoration compared with land use types with severe disturbance in a semi-arid region.

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Section: Study Areamentioning

confidence: 99%

Responses of Soil Seed Bank and Vegetation to the Increasing Intensity of Human Disturbance in a Semi-Arid Region of Northern China

Xiao

Wang

et al. 2017

Sustainability

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“…13 and Table 3). The existence of the conserved zones not only reduces the sediment entry from the direct surface flow of the main rivers but also creates and sustains the natural habitat of the flora and fauna in the surrounding area [57][58][59].…”

Section: Solution To Land Use Changesmentioning

confidence: 99%

Sedimentation and water quality deterioration problems at Terengganu River Basin, Terengganu, Malaysia

Wahab¹,

Kamarudin²,

Toriman³

et al. 2019

Desalination and Water Treatment

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a b s t r a c tRivers, which provide 90% of the readily available freshwater, are key components of global water resource system. Terengganu River experienced deterioration in water quality, resulting from the sedimentation, anthropogenic, geomorphology problems and unsustainable development management around the river basin. This study was implemented to prove the sedimentation problem especially the formation of total suspended solid (TSS) and annual sediment load (SL). The technique of analysis of primary data obtained which determine according with the procedure TSS and SL. The results showed that the highest average of TSS (mg/L) is 67.2 (wet season) and 128.2 (dry season) which are class III. While the highest turbidity is 43.57 (wet season) and 21.57 (dry season) which are Class II based on National Water Quality Standard (NWQS). The highest annual average estimation for annual SL flow out from the Terengganu River Basin is 6,846.709 tonnes/km 2 /year (Manir River Basin) the lowest in the Pauh River Basin is 2.850 tonnes/km 2 /year. The statistical analysis proved the weak regression relationship between TSS, river discharges (Q), SL and area of catchment caused by the anthropogenic factors and uncertain climate changes. Furthermore, the water in the Terengganu River was classified under class III caused by the active land use activities especially industrial and development but it is still suitable for recreational activities and safe for body contact because its water quality index is not less than 65% which early stage of Class II. The contributors of sedimentation problems are from unsustainable land use such as sand mining activities which effectively trap the bed sediments, backflow that carries out high sediments, as well as sedimentation produced due to the river bank erosion. This study suggests the sedimentation management methods including land use settlement, cliff erosion problems, settlement and negotiable of uncontrolled development operations in Terengganu River and the integration of river management methods based on integrated river basin management in Terengganu River Basin is recommended.

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“…N and P losses were calculated by coupling remote sensing data with a RIPArian Model (RIPAM, EcoHAT, Beijing, China). RIPAM couples simple process-based modules and remote sensing data to estimate soil denitrification rates, soil nitrogen emissions, phosphorus removed by soil erosion, and nitrogen and phosphorus removal by vegetation uptake [37][38][39][40]. The framework of RIPAM that relates to N and P uptake is shown in Figure 2, and its main functions and parameters are listed in Table 1.…”

Section: Simulation Of N and P Uptakementioning

confidence: 99%

“…In other published papers [37][38][39][40], the RIPAM model was tested in the Guanting Reservoir, and the simulations of net primary productivity (NPP), NPP allocation, and nutrient uptake all had considerable accuracy during the growing season (take N uptake rates for example, its R 2 value is 0.95). Since the Miyun Reservoir and Guanting Reservoir are located within a distance of less than 100 km and their geographical conditions and climate are similar [36,39], we adopted the model parameters of the Guanting Reservoir to apply to the Miyun Reservoir [37,39,44].…”

Section: Simulation Of N and P Uptakementioning

confidence: 99%

Decline of N and P Uptake in the Inner Protection Zone of a Terminal Reservoir during Inter-Basin Water Transfers

Yang

Bai

Zhao

et al. 2018

Water

Self Cite

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Inter-basin water transfer projects are designed to relieve water scarcity around the world. However, ecological problems relating to reductions in protection zone functions can occur during inter-basin transfers. This paper uses the largest inter-basin water transfer project in the world, namely, the South-to-North Water Transfer Project (SNWTP) in China, as an example to analyze the variation of Miyun Reservoir's inner protection zone functions when water is transferred. Specifically, a riparian model (RIPAM) coupled with remote sensing data were used to calculate the nitrogen (N) and phosphorus (P) losses due to plant uptake, and these results were validated by in situ survey data. Then, correlations between water levels and N and P removal were analyzed. The results show that water table disturbances resulting from elevated water levels strongly influence the growth of plants and have obvious negative impacts on N and P removal in the inner protection zone. With the implementation of the middle route of the SNWTP, the water level of Miyun will rise to 150 m in 2020, and subsequently, the total net primary productivity (NPP) could decline by more than 40.90% from the level in 2015, while the N and P uptake could decline by more than 53.03% and 43.49%, respectively, from the levels in 2015, according to the modeling results. This will lead to declines in the inner protection zone's defense effectiveness for N and P interception and increases in risks to the security of water resources. The results of this study provide useful knowledge for managing the defense function of the terminal reservoir's inner protection zone and for ensuring that water quality is maintained during the diversion process.

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Spatially explicit estimation of soil denitrification rates and land use effects in the riparian buffer zone of the large Guanting reservoir

Cited by 26 publications

References 33 publications

Responses of Soil Seed Bank and Vegetation to the Increasing Intensity of Human Disturbance in a Semi-Arid Region of Northern China

Responses of Soil Seed Bank and Vegetation to the Increasing Intensity of Human Disturbance in a Semi-Arid Region of Northern China

Sedimentation and water quality deterioration problems at Terengganu River Basin, Terengganu, Malaysia

Decline of N and P Uptake in the Inner Protection Zone of a Terminal Reservoir during Inter-Basin Water Transfers

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