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Article ; Online: Quantitative analysis for the response of streamflow variation to driving factors in seven major basins across China

Xu Wu / Jianshe Li / Xiaojing Shen

Ecological Indicators, Vol 148, Iss , Pp 110081- (2023)

2023

Abstract: 1.2 billion people and 90% of the national GDP are concentrated in China's seven river basins (RB7). Streamflow variation of RB7 caused by climate change and human disturbance posing a severe challenge to the water resources security situation in China. ... ...

Abstract	1.2 billion people and 90% of the national GDP are concentrated in China's seven river basins (RB7). Streamflow variation of RB7 caused by climate change and human disturbance posing a severe challenge to the water resources security situation in China. Quantifying streamflow changes under these two stresses is crucial for deeply understanding hydrologic process and reasonably utilizing water resource. The present study analyzed the trends of data series with Sen’s slope estimator and Mann-Kendall test, and quantified the influences of precipitation (P), potential evapotranspiration (ET0) and underlying surface parameter (ω) on streamflow variation by Budyko hypothesis-based elasticity coefficient method in 9 catchments controlled by mainstream hydrological stations from seven major river basins across China. Results showed that: Annual streamflow in LRB, YRB1, and HaiRB displayed significant downward trends of −0.16, −0.67 and −0.53 mm·y−1 during 1961–2020. Except for HuaiRB, the annual streamflow series of other catchments experienced significant mutations during 1984–2000. The elasticity coefficient εP ranged from 1.65 to 3.56, εET0 ranged from −2.56 to −0.65, and εω ranged from −3.79 to −0.52. A higher sensitivity of streamflow to P and ω, comparing to ET0. Streamflow in the north basins was more sensitive to driving factors than in the south basins across China. Variations in annual streamflow in LRB and YZRB were mainly ascribed to the changes in P, with the contribution rates ranging 65.1–162%, while the underlying surface change dominated the streamflow reduction in SHRB, HaiRB, HuaiRB, YRB, and PRB, with the contribution rates ranging 60.0–163%. ET0 had a weak effect on streamflow change in most basins. The change of underlying surface ω was largely due to vegetation cover changing, urbanization expanding, water consumption increasing and water conservancy constructing.
Keywords	Streamflow variation ; Budyko hypothesis ; Quantitative analysis ; Seven major basins ; China ; Ecology ; QH540-549.5
Subject code	550
Language	English
Publishing date	2023-04-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Spatiotemporal Distribution of Drought and Humidity in China Based on the Pedj Drought Index (PDI)

Xu Wu / Xiaojing Shen / Jianshe Li

Sustainability, Vol 14, Iss 8, p

2022 Volume 4546

Abstract: Drought is one of the most devastating natural disasters, especially in China. In drought assessment, the PDI has high robustness, is easier to obtain than indices such as SPEI and PDSI, and is more advantageous in regions with sparse stations. The ... ...

Abstract	Drought is one of the most devastating natural disasters, especially in China. In drought assessment, the PDI has high robustness, is easier to obtain than indices such as SPEI and PDSI, and is more advantageous in regions with sparse stations. The present study employs the annual PDI with the precipitation and temperature data from 830 meteorological stations to systematically study the interannual variation characteristics of drought and humidity in China during 1970–2019. The results showed the following: (1) 26.6% of the total statistics from meteorological stations showed significant ( p < 0.05) increases in annual PDI values throughout China during 1970–2019. (2) Air temperature plays a more remarkable role than precipitation in assessing the drying trend with PDI throughout China. (3) About 71% of stations experienced more drought events (PDI > 1) than humidity events (PDI < −1), 14% of stations experienced more humidity events than drought events. (5) All stations experienced drought events (PDI > 1) with a frequency range from 6% to 32% and humidity events (PDI < −1) with a frequency range from 8% to 36%. Most of the stations experienced extreme drought events (PDI > 3) with a frequency range from 2% to 10%, while only 177 stations experienced extreme humidity events (PDI < −3) with a frequency range from 2% to 4%. (6) More than 67% of stations experienced drought conditions during both periods of 1972–1974 and 2000–2002 and even exceeded 80% in the three years 1972, 2000, and 2001. Both periods of 1976–1983 and 1985–1999 can be considered to be a humidity period throughout China. In conclusion, the PDI successfully expresses the interannual variation characteristics of drought and humidity events throughout China previously captured by other prominent, recommended drought indices.
Keywords	Pedj Drought Index (PDI) ; drought ; humidity ; China ; Environmental effects of industries and plants ; TD194-195 ; Renewable energy sources ; TJ807-830 ; Environmental sciences ; GE1-350
Subject code	950
Language	English
Publishing date	2022-04-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Reservoir Operation Sequence- and Equity Principle-Based Multi-Objective Ecological Operation of Reservoir Group

Xu Wu / Xiaojing Shen / Chuanjiang Wei / Xinmin Xie / Jianshe Li

Sustainability, Vol 14, Iss 6150, p

A Case Study in a Basin of Northeast China

2022 Volume 6150

Abstract: The sequence of reservoir operations has a profound influence on the regulation and storage capacity of reservoir groups to effectively utilise the natural water inflow and external water transfer in the basin, especially for reservoir groups with water ... ...

Abstract	The sequence of reservoir operations has a profound influence on the regulation and storage capacity of reservoir groups to effectively utilise the natural water inflow and external water transfer in the basin, especially for reservoir groups with water supply tasks. This study establishes the reservoir operation sequence (ROS) of four reservoir group modes, aiming at national economic and ecological water consumption, constructs a model of ROS-based multi-objective ecological operation of the reservoir group, and uses the particle swarm optimisation (PSO) method to optimise the solution. Analysing the results of the three schemes in two scenarios at the Yinma River Basin (YRB) indicates that after the Central Jilin Water Supply Project is put into operation, not only will the production and living water be effectively improved, but also the ecological water in the basin. Then, we compared the optimisation results of different water supply sequences in series and parallel reservoirs, which illustrates that the ROS of the four modes formulated in this research is the optimal water supply sequence.
Keywords	reservoir operation sequence ; ecological operation ; multi-objective ; reservoir group ; Environmental effects of industries and plants ; TD194-195 ; Renewable energy sources ; TJ807-830 ; Environmental sciences ; GE1-350
Subject code	550
Language	English
Publishing date	2022-05-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Effect of Cryotherapy Temperature on the Extension Performance of Healthy Adults’ Legs

Yichen Lu / Yuqi He / Shanshan Ying / Qiaojun Wang / Jianshe Li

Biology, Vol 10, Iss 591, p

2021 Volume 591

Abstract: Cryotherapy as a measurement of sports recovery and treatment has been utilized by more and more athletes and coaches. The aim of this study was to investigate the effect of different temperature cryotherapies on leg extension performance. Thirty-one ... ...

Abstract	Cryotherapy as a measurement of sports recovery and treatment has been utilized by more and more athletes and coaches. The aim of this study was to investigate the effect of different temperature cryotherapies on leg extension performance. Thirty-one male participants from a University volunteered to join two different temperature cryotherapies. The peak power and peak force of right leg extension performance of each participant was measured by Keiser, before and after cryotherapy, respectively. The results of this study show that there was a significant difference in peak power (t = −3.203, p value = 0.003) and peak force (t = −4.662, p value = 0) before and after 0 °C cryotherapy. In addition, there was a significant difference in peak force (t = −4.36, p value = 0) before and after −5 °C cryotherapy. Besides, the changing rates of peak power (3.03%) and peak force (11.51%) in the 0 °C group were higher than those of peak power (2.80%), as well as peak force (7.45%), in the −5 °C group. The PF in the 0 °C and −5 °C groups both significantly increased after cryotherapy. Peak power significantly increased after 0 °C cryotherapy, but did not significantly increase after −5 °C cryotherapy. The changing rates of peak power and peak force in the 0 °C group were both higher than the −5 °C group. A short period of cold treatment at 0 °C may increase the leg extension ability. A 0 °C cold therapy for a short period of time is more suitable than a −5 °C one for athletes to recover during the interval within a competition. Athlete and coach could choose an appropriate temperature to help increase performance of physical level and recovery.
Keywords	cryotherapy ; temperature ; extension performance ; peak power ; peak force ; Biology (General) ; QH301-705.5
Subject code	796
Language	English
Publishing date	2021-06-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: The Effect of Standing Mats on Biomechanical Characteristics of Lower Limbs and Perceived Exertion for Healthy Individuals during Prolonged Standing

Yan Zhang / Yining Xu / Zixiang Gao / Hongjun Yan / Jianshe Li / Yichen Lu

Applied Bionics and Biomechanics, Vol

2022 Volume 2022

Abstract: Objective. To identify the effect of standing mats on biomechanical characteristics of lower limbs and perceived exertion for healthy adult individuals during a prolonged standing task. Methods. 32 healthy college students were recruited in the ... ...

Abstract	Objective. To identify the effect of standing mats on biomechanical characteristics of lower limbs and perceived exertion for healthy adult individuals during a prolonged standing task. Methods. 32 healthy college students were recruited in the randomized and cross-over designed trial according to the effect size and statistical power. After collecting the anthropometric data, each participant was asked to finish 2 sessions of 4-hour prolonged standing tasks on standing mats (MS) and hard ground (GS) in a random order and with a 72-hour interval rest. The plantar pressure distribution, foot morphology, and scores of the BESS (balance error scoring system) would be recorded pre- and posteach task. The Borg Rating of Perceived Exertion (RPE) would be collected during the whole task. Paired-samples t test was adopted to analyse the before and after difference within group and independent-samples t test was adopted to analyse the difference between groups separately. Results. (1) A prolonged standing task on both MS and GS have a negative effect on RPE and balance performance. (2) The negative effect on RPE and balance performance induced by MS is significantly smaller than that induced by GS. (3) Compared to GS, prolonged standing on MS has a lower peak plantar pressure and an implicit decrease in navicular drop and AHI (arch index). Conclusion. Standing mat tends to alleviate the fatigue induced by prolonged standing in lower limbs, optimize the distribution of plantar pressure, and maintain the stability.
Keywords	Biotechnology ; TP248.13-248.65 ; Biology (General) ; QH301-705.5
Subject code	796
Language	English
Publishing date	2022-01-01T00:00:00Z
Publisher	Hindawi Limited
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: The Influence of Social Support on Leisure-Time Physical Activity of the Elderly in the Chinese Village of Fuwen

Jiayi Zhou / Chen Yang / Jiabin Yu / Xiaoguang Zhao / Jinan Wu / Zhiyong Liu / Jianshe Li / Yaodong Gu

Healthcare, Vol 11, Iss 2193, p

2023 Volume 2193

Abstract: The purpose of this study was to examine the associations of social support factors with leisure-time physical activity (LTPA) of older people in Fuwen village. A cross-sectional study included 523 randomly selected elderly people (60+ years) whose LTPA ... ...

Abstract	The purpose of this study was to examine the associations of social support factors with leisure-time physical activity (LTPA) of older people in Fuwen village. A cross-sectional study included 523 randomly selected elderly people (60+ years) whose LTPA levels were determined using the shortened version of the International Physical Activity Questionnaire (IPAQ-S). A modified version of the Physical Activity Social Support Scale (PASSS) was operated to gather perceived scores of the social support factors. A multivariate linear regression was performed to locate associations of perceived scores of social supports with leisure-time walking (LTW) and moderate and vigorous physical activity (MVPA). The results indicated that social support from family was positively and significantly related to LTW and MVPA in both models. The community factor was positively and significantly correlated with MVPA in both models. The sport club factor was related to LTW and MVPA to some extent. The results suggest that social support from family is the most important motivator for older people’s LTW and MVPA in the village of Fuwen. Social support from the community is the motivator for older people’s MVPA. The sport club factor has some effects on older people’s LTW and MVPA as well. More future studies are needed to extend the database of the relationship between social support and rural older people’s physical activity.
Keywords	elderly ; recreational physical activity ; family support ; rural population ; motivators ; China ; Medicine ; R
Subject code	796
Language	English
Publishing date	2023-08-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: A protocol for a pooled analysis of cohort studies

Yan Wang / Changbo Shen / Junyan Zhang / Qingcheng Yang / Jianshe Li / Jun Tan / Hang Yu / Zubing Mei

PLoS ONE, Vol 18, Iss

The association between depression and anxiety in epileptic disorders

2023 Volume 12

Keywords	Medicine ; R ; Science ; Q
Language	English
Publishing date	2023-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Comparison Study of Perceived Neighborhood-Built Environment and Elderly Leisure-Time Physical Activity between Hangzhou and Wenzhou, China

Jiabin Yu / Chen Yang / Shen Zhang / Diankai Zhai / Jianshe Li

International Journal of Environmental Research and Public Health, Vol 17, Iss 9284, p

2020 Volume 9284

Abstract: Physical activity and health are of significant importance for the rapid aging population in China. Built environment has been suggested to be associated with elderly physical activity and health. However, the association differences between cities ... ...

Abstract	Physical activity and health are of significant importance for the rapid aging population in China. Built environment has been suggested to be associated with elderly physical activity and health. However, the association differences between cities remain unclear. Perceived built environment scores and elderly leisure-time physical activity (LTPA) of 308 elderly in Hangzhou and 304 elderly in Wenzhou were collected using Neighborhood Environment Walkability Scale and International Physical Activity Questionnaire, respectively. A multivariate linear regression method and T-test were used to analyze of the associations between elderly LTPA and built environment and the differences between the two cities, respectively. The results showed that LTPA was positively associated with walking/cycling facilities and crime safety in both cities. LTPA was positively correlated with residential density, aesthetics, pedestrian/traffic safety in Wenzhou and negatively correlated with access to services in Hangzhou. The perceived scores of aesthetics (2.71 vs. 2.45) and pedestrian/traffic safety (2.11 vs. 1.71) in Hangzhou were significantly higher than those in Wenzhou. The results suggested that built environment elements like higher walking/cycling facilities and crime safety may motivate elderly engaging LTPA in both cities. However, LTPA was affected by different factors in these two cities. In the urban redevelopment, survey conducted in its own city would provide meaningful information and cannot be neglected.
Keywords	built environment elements ; aging over 60 years ; recreational physical activity ; Empirical study ; Medicine ; R
Subject code	380
Language	English
Publishing date	2020-12-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: The Effect of the Built Environment on Older Men′s and Women′s Leisure-Time Physical Activity in the Mid-Scale City of Jinhua, China

Jiabin Yu / Chen Yang / Shen Zhang / Diankai Zhai / Aiwen Wang / Jianshe Li

International Journal of Environmental Research and Public Health, Vol 18, Iss 1039, p

2021 Volume 1039

Abstract: Physical activity has been suggested to be beneficial in preventing disease and improving body function in older people. Older people’s leisure-time physical activity (LTPA) is affected by various factors, especially environmental factors. However, the ... ...

Abstract	Physical activity has been suggested to be beneficial in preventing disease and improving body function in older people. Older people’s leisure-time physical activity (LTPA) is affected by various factors, especially environmental factors. However, the differences in the association between older people’s LTPA and the built environment in different sex groups remain unclear. Perceived built environment scores and older people’s LTPA were collected for 240 older people in Jinhua using the Neighborhood Environment Walkability Scale and International Physical Activity Questionnaire, respectively. A linear regression method was used to analyze the associations between older people’s LTPA and the built environment in men, women, and all participants. The results showed that land use mix diversity was associated with LTPA in older people for both sexes. In men, LTPA was also associated with access to services. However, in women, LTPA was associated with residential density, street connectivity, and crime safety. The relationship varied when demographic variables were incorporated into the regression analysis. Those results indicated that a shorter perceived distance from home to destination would motivate older people to engage more in LTPA. Older people’s LTPA was affected by various built environment factors according to different sex groups. Women’s LTPA was generally more sensitive to the built environment. More studies are needed to confirm the association between LTPA in older people and the built environment in men and women in mid- or small-sized Chinese cities in the future.
Keywords	built environment elements ; walkability ; aging over 60 years old ; gender difference ; recreational physical activity ; Medicine ; R
Subject code	390
Language	English
Publishing date	2021-01-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Change of Physiological Properties and Ion Distribution by Synergistic Effect of Ca 2+ and Grafting under Salt Stress on Cucumber Seedlings

Xiaodong Wang / Zhiqian Lan / Lei Tian / Jianshe Li / Guankai Yang / Yanming Gao / Xueyan Zhang

Agronomy, Vol 11, Iss 848, p

2021 Volume 848

Abstract: Salinization is an important soil environmental problem, which severely restricts the sustainable production of cucumbers. Therefore, how to improve the salt tolerance of cucumbers is a global problem. Grafting improves the resistance of crops, and ... ...

Abstract	Salinization is an important soil environmental problem, which severely restricts the sustainable production of cucumbers. Therefore, how to improve the salt tolerance of cucumbers is a global problem. Grafting improves the resistance of crops, and calcium ion (Ca 2+ ) weakens the permeability of the plasma membrane. In this paper, grafting cucumber with NaCl-free treatment was the control treatment (CK). Under salt stress, grafting combined different concentrations of CaCl 2 and non-grafted (NG) were considered as treatments. The synergistic effect of grafting and Ca 2+ to relieve salt stress on cucumber seedlings was investigated. The results revealed that grafting (G), Ca 2+ , and their interaction significantly influenced plant growth, osmotic adjustment substances, enzyme activities, and iron distribution. Under salt stress, grafting increased the absorption of potassium ion (K + ) and Ca 2+ in cucumber stems and leaves, but compared with NG, it significantly reduced the accumulation of Na + in those parts by 61.58–89.40%. Moreover, supplication suitable Ca 2+ content had a similar effect. Supplemental Ca 2+ promoted the shoot and root biomass. The 10 mM L −1 Ca 2+ had the highest biomass, compared with CK and NG, an increase of 49.95% and 20.47%, respectively; the lowest sodium ion (Na + ). The highest Ca 2+ accumulation in cucumber stem and leaves was found in 10 mM L −1 Ca 2+ treatment. Supplemental Ca 2+ increased free proline (Pro) and decreased malondialdehyde (MDA) content during the entire salt stress period. At 11 days, compared with 0 mM L −1 Ca 2+ treatment, pro content was increased by 4.70–25.31, and MDA content was decreased by 1.08–4.90 times, respectively. Superoxide dismutase (SOD) activity, relative growth rate of plant height (PH), and stem volume (SV), and K + /Na + and K + /Ca 2+ in cucumber leaves had significantly negative correlations with a salt damage score. The combination of grafting and supplemental 5–20 mM L −1 Ca 2+ relieved salt damage to cucumber seedlings. The best ...
Keywords	grafting ; salt stress ; CaCl 2 concentration ; osmotic adjustment substances ; ion distribution ; Agriculture ; S
Subject code	333 ; 630
Language	English
Publishing date	2021-04-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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