Your search found 23 records
1 Li, Y.; Chu, S. T. 1995. Field evaluation of aquifer-recharge model. Journal of Irrigation and Drainage Engineering, 121(6):385-389.
(Location: IWMI-HQ Call no: PER Record No: H017613)
2 Wu, H.; Childress, W. M.; Li, Y.; Spence, R. D.; Ren, J. 1996. An integrated simulation model for a semi-arid agroecosystem in the Loess Plateau of Northwestern China. Agricultural Systems, 52(1):83-111.
(Location: IWMI-HQ Call no: PER Record No: H019355)
3 Cabangon, R. J.; Castillo, E. G.; Lu, G.; Cui, Y. L.; Tuong, T. P.; Bouman, B. A. M.; Li, Y.; Chen, C.; Wang, J.; Liu, X. 2001. Impact of alternate wetting and drying irrigation on rice growth and resource-use efficiency. Barker, R.; Loeve, R.; Li, Y. H.; Tuong, T. P. (Eds.). Water-saving irrigation for rice: proceedings of an international workshop held in Wuhan, China, 23-25 March 2001. Colombo, Sri Lanka: International Water Management Institute (IWMI) pp.55-79.
Crop-based irrigation ; Rice ; Fertilizers ; Nitrogen ; Rain ; Crop yield ; Percolation ; Seepage ; Paddy fields ; Experiments / China / Hubei / Tuanlin
(Location: IWMI-HQ Call no: IWMI 631.7.2 G592 BAR Record No: H027863)
4 Huang, M.; Shao, M.; Li, Y.. 2001. Comparison of a modified statistical-dynamic water balance model with the numerical model WAVES and field measurements. Agricultural Water Management, 48(1):21-35.
Water balance ; Models ; Wheat ; Precipitation ; Soil water ; Soil properties ; Plant growth / China / Loess Plateau
(Location: IWMI-HQ Call no: PER Record No: H028135)
5 Li, Y.; Ni, J. 2001. Influence of sediment transport on water levels in the middle Yangtze River. Water International, 26(2):191-196.
(Location: IWMI-HQ Call no: PER Record No: H029159)
6 Shao, M.; Huang, M.; Zhang, L.; Li, Y.. 2002. Simulation of field-scale water balance on the Loess Plateau using the WAVES model. In McVicar, T. R.; Rui, L.; Walker, J.; Fitzpatrick, R. W.; Changming, L. (Eds.), Regional water and soil assessment for managing sustainable agriculture in China and Australia. Canberra, Australia: ACIAR. pp.48-56.
Simulation models ; Water balance ; Soil water ; Soil fertility ; Water use efficiency ; Crop yield / China / Loess Plateau
(Location: IWMI-HQ Call no: 631.7.1 G592 MCV Record No: H032989)
7 Barker, Randolph; Tuong, T. P.; Li, Y.; Castillo, E. G.; Bouman, B. A. M. 2004. Growing more rice with less water: research findings from a study in China. Paddy and Water Environment, 2:185.
(Location: IWMI-HQ Call no: IWMI 631.7.2 G592 BAR Record No: H035931)
8 Cabangon, R. J.; Tuong, T. P.; Castillo, E. G.; Bao, L. X.; Lu, G.; Wang, G.; Cui, Y.; Bouman, B. A. M.; Li, Y.; Chen, C.; Wang, J. 2004. Effect of irrigation method and N-fertilizer management on rice yield, water productivity and nutrient-use efficiencies in typical lowland rice conditions in China. Paddy and Water Environment, 2:195-206.
Rice ; Paddy fields ; Crop yield ; Irrigated farming ; Experiments ; Water balance ; Productivity ; Fertilizers ; Nitrogen ; Climate / China
(Location: IWMI-HQ Call no: P 7105 Record No: H035933)
9 Li, Y.; Barker, Randolph. 2004. Increasing water productivity for paddy irrigation in China. Paddy and Water Environment, 2:187-193.
Rice ; Paddy fields ; Irrigated farming ; Crop-based irrigation ; Water conservation ; Productivity ; Water rates ; Water use efficiency ; Irrigation efficiency / China
(Location: IWMI-HQ Call no: IWMI 631.7.2 G592 BAR Record No: H035932)
(Location: IWMI-HQ Call no: IWMI 631.45 G000 VAL Record No: H037485)
11 Li, Y.; Cohen, Y.; Wallach, R.; Cohen, S.; Fuchs, M. 2004. On quantifying soil water deficit of a partially wetted root zone by the response of canopy or leaf conductance. Agricultural Water Management, 65(1):21-38.
(Location: IWMI-HQ Call no: PER Record No: H034195)
12 Valentin, Christian; Poesen, J.; Li, Y.. 2005. Gully erosion: impacts, factors and control. Catena, 63:132-153.
Erosion ; Environmental effects ; Farming systems ; Drainage ; Sedimentation ; Land use ; Soil conservation / China
(Location: IWMI-HQ Call no: IWMI 631.45 G000 VAL Record No: H038188)
13 Chen, D.; White, R.; Li, Y.; Zhang, J.; Li, B.; Zhang, Y.; Edis, R.; Huang, Y.; Cai, G.; Wei, Y.; Zhu, A.; Hu, K.; Li, G.; Zhu, Z. 2006. Conservation management of water and nitrogen in the North China Plain using a GIS-based water and nitrogen management model and agricultural decision support tool. In Willett, I. R.; Gao, Z. (Eds.) Agricultural water management in China: Proceedings of a workshop held in Beijing, China, 14 September 2005. Canberra, Australia: ACIAR. pp.26-38.
Water conservation ; Irrigated farming ; Nitrogen ; Fertilizers ; Wheat ; Maize ; GIS ; Decision support tools / China / North China Plain
(Location: IWMI-HQ Call no: 631.7 G592 WIL Record No: H039219)
14 Feng, L.; Bouman, B. A. M.; Tuong, T. P.; Li, Y.; Lu, G.; Cabangon, R. J.; Feng, Y. 2006. Effects of groundwater depth and water-saving irrigation on rice yield and water balance in the Liuyuankou Irrigation System, Henan, China. In Willett, I. R.; Gao, Z. (Eds.) Agricultural water management in China: Proceedings of a workshop held in Beijing, China, 14 September 2005. Canberra, Australia: ACIAR. pp.52-66.
Water conservation ; Groundwater ; Irrigated farming ; Rice ; Simulation models ; Soil water ; Supplemental irrigation ; Water balance ; Irrigation systems / China / Liuyuankou Irrigation System / Henan / Kaifeng / Panlou Village / Yellow River
(Location: IWMI-HQ Call no: 631.7 G592 WIL Record No: H039221)
15 Zhang, F.; Hanjra, Munir A.; Hua, F.; Shu, Yunqiao; Li, Y.. 2014. Analysis of climate variability in the Manas River Valley, North-Western China (1956–2006). Mitigation and Adaptation Strategies for Global Change, 19(7):1091-1107. [doi: https://doi.org/10.1007/s11027-013-9462-2]
Climate change ; Rivers ; Valleys ; Temperature ; Precipitation ; Regression analysis ; Land use ; Land policies ; Farmland ; Crop production ; Water policy ; Irrigation / North-Western China / Manas River Valley
(Location: IWMI HQ Call no: e-copy only Record No: H046022)
(0.41 MB)
This paper examines the short-run climate variability (change in the levels of temperature and precipitation) with a focus on the Manas River Valley, North-Western China, over the past 50 years (1956 to 2006) using data collected from four meteorological stations. The results show that the annual mean temperature had a positive trend, with temperature increasing at 0.4 °C per decade. Application of the Mann-Kendall test revealed that the overall positive trend became statistically significant at the p = 0.95 level only after 1988. The increase in temperature was most marked in winter and spring (0.8 and 0.7 °C per decade, respectively), absent in summer and very small in autumn (0.1 °C per decade). Concerning precipitation, our results indicate a negative but not significant trend for the period between 1956 and 1982, while annual total precipitation tended to increase thereafter and the increase was mainly during the crop growing-season. Concerning variability in temperature and precipitation, the characteristic time scales were identified by application of wavelet analysis. For temperature the quasi-decadal variations were found on time scales between approximately 5 and 15 years, with a peak in wavelet variance on a time scale of 9 years. For precipitation, the most striking features were a precipitation increase (6.7 mm per decade) during the crop growing season. Irregularities and abrupt changes in both temperature and precipitation were more common at scales less than 10 years, indicating the complexity and uncertainty in the short-period climate variability. Possible causes of climate variability in the Manas River Valley may include anthropogenic factors such as intensive human activity and the expansion of both farmland and irrigation. Global climate variability might also have some impacts on the local climate variability; analyses of local and regional climate trends can better inform local adaptation actions for global impacts.
16 Song, P.; Zheng, X.; Li, Y.; Zhang, K.; Huang, J.; Li, H.; Zhang, H.; Liu, L.; Wei, C.; Mansaray, L. R.; Wang, D.; Wang, X. 2020. Estimating reed loss caused by locusta migratoria manilensis using UAV [Unmanned Aerial Vehicle] -based hyperspectral data. Science of the Total Environment, 719:137519. [doi: https://doi.org/10.1016/j.scitotenv.2020.137519]
Crop losses ; Estimation ; Locusta migratoria ; Unmanned aerial vehicles ; Monitoring ; Forecasting ; Models ; Satellite observation ; Remote sensing ; Vegetation index / China / Kenli / Dongying / Shandong
(Location: IWMI HQ Call no: e-copy only Record No: H049853)
(3.89 MB)
Locusta migratoria manilensis has caused major damage to vegetation and crops. Quantitative evaluation studies of vegetation loss estimation from locust damage have seldom been found in traditional satellite-remote-sensing-based research due to insufficient temporal-spatial resolution available from most current satellite-based observations. We used remote sensing data acquired from an unmanned aerial vehicle (UAV) over a simulated Locusta migratoria manilensis damage experiment on a reed (Phragmites australis) canopy in Kenli District, China during July 2017. The experiment was conducted on 72 reed plots, and included three damage duration treatments with each treatment including six locust density levels. To establish the appropriate loss estimation models after locust damage, a hyperspectral imager was mounted on a UAV to collect reed canopy spectra. Loss components of six vegetation indices (RVI, NDVI, SAVI, MSAVI, GNDVI, and IPVI) and two “red edge” parameters (Dr and SDr) were used for constructing the loss estimation models. Results showed that: (1) Among the six selected vegetation indices, loss components of NDVI, MSAVI, and GNDVI were more sensitive to the variation of dry weight loss of reed green leaves and produced smaller estimation errors during the model test process, with RMSEs ranging from 8.8 to 9.1 g/m;. (2) Corresponding model test results based on loss components of the two selected red edge parameters yielded RMSEs of 27.5 g/m2 and 26.1 g/m2 for Dr and SDr respectively, suggesting an inferior performance of red edge parameters compared with vegetation indices for reed loss estimation. These results demonstrate the great potential of UAV-based loss estimation models for evaluating and quantifying degree of locust damage in an efficient and quantitative manner. The methodology has promise for being transferred to satellite remote sensing data in the future for better monitoring of locust damage of larger geographical areas.
17 Zuo, Q.; Wu, Q.; Yu, L.; Li, Y.; Fan, Y. 2021. Optimization of uncertain agricultural management considering the framework of water, energy and food. Agricultural Water Management, 253:106907. [doi: https://doi.org/10.1016/j.agwat.2021.106907]
Agricultural production ; Water management ; Water resources ; Energy resources ; Food security ; Nexus ; Surface water ; Water supply ; Resource allocation ; Decision making ; Pesticides ; Fertilizers ; Crops ; Uncertainty ; Models / China / Henan
(Location: IWMI HQ Call no: e-copy only Record No: H050414)
(10.60 MB)
Synergetic development of water, energy and food is prerequisite for coping with issues of increment of global population, deterioration of ecological environment and aggravation of climate change. This study aims to develop a scenario-based type-2 fuzzy interval programming (STFIP) approach for planning agricultural water, energy and food (WEF) as well as crop area management. Uncertainties presented as interval numbers, scenarios and fuzzy sets as well as the dual uncertainties (i.e. interval-scenario and type-2 fuzzy interval) can be effectively tackled by the STFIP method. Then, a STFIP-WEFN model is developed and applied to maximize net agricultural profit with integrated management of productive resources for Henan Province, China. Solutions of different water resources, diverse energy resources and multiple agricultural crops in association with various water supply structures between current situation and future policy orientation are examined. Results disclose that: over the entire planning horizon, a) the total planting area of crops can increase from [129.3, 133.6] × 103 km2 to [132.0, 135.6] × 103 km2 by optimizing resources allocation; b) uncertainties existing in the WEFN system can lead to a change rate of the system benefit by 16.93%; c) the total planting area can increase by [4.00, 6.05] % when the groundwater ratio changes from 40% to 55%. These findings can help effectively optimize the existing planting structure and coordinate the development of Henan Province among water, energy, food, economy, society and environment.
18 Yang, T.; Zhu, Y.; Li, Y.; Zhou, B. 2021. Achieving win-win policy outcomes for water resource management and economic development: the experience of Chinese cities. Sustainable Production and Consumption, 27:873-888. [doi: https://doi.org/10.1016/j.spc.2021.02.006]
Water resource management ; Economic development ; Water policies ; Cities ; Sustainability ; Urban areas ; Strategies ; Water use ; Wastewater treatment ; Regulations ; Drainage ; Infrastructure ; Water pollution ; Water conservation ; Local government / China
(Location: IWMI HQ Call no: e-copy only Record No: H050482)
(1.14 MB)
Water resource management may restrict economic development, and a preference for economic development may weaken the effect of water resource management. The Water Eco-Civilization City (WEC) is a significant pilot policy in China, and is designed to achieve both effective water resource management and economic development. This study assessed possible win-win outcomes of this policy by applying a water eco-efficiency (WEE) perspective. First, a slacks-based measure (SBM) was used to calculate WEE. Then, a difference-in-differences (DID) strategy and mediating effect model were applied to examine whether and how the WEC policies improved WEE and achieved desired policy outcomes in cities. The panel dataset used for the study covered 275 prefecture-level cities from 2008 to 2017. The major findings were as follows: (1) The WEC policies achieved win-win outcomes in pilot cities, meaning it achieved both positive water resource management and economic outcomes; specifically, it contributed 48.63% of the total increase in WEE. (2) Three effective WEC policies realized win-win outcomes: upgrading the industrial structure; scaling up drainage infrastructure; and encouraging centralized wastewater treatment. Upgrading the industrial structure was the most effective policy. (3) WEC policy outcomes were heterogeneous under different city conditions. In cities with more abundant water resources, scaling up drainage infrastructures and encouraging centralized wastewater treatment were more effective. In cities with a larger industrial scale, the WEC policies could not achieve win-win outcomes, because it was not possible to upgrade the industrial structure or encourage centralized wastewater treatment. In cities with more intense wastewater regulations, upgrading the industrial structure and encouraging centralized wastewater treatment were more effective. These findings exemplify the policies that achieve win-win outcomes, and highlight the fact that governments should consider water resource abundance, industrial scale, and the current intensity of wastewater regulations before designing new policies.
19 Cao, X.; Li, Y.; Wu, M. 2022. Irrigation water use and efficiency assessment coupling crop cultivation, commutation and consumption processes. Agricultural Water Management, 261:107370. (Online first) [doi: https://doi.org/10.1016/j.agwat.2021.107370]
Irrigation water ; Water use efficiency ; Crop production ; Water management ; Irrigation efficiency ; Water productivity ; Water resources ; Virtual water ; Evapotranspiration ; Wheat ; Maize ; Rice ; Cereals ; Food security / China
(Location: IWMI HQ Call no: e-copy only Record No: H050780)
(6.10 MB)
Water use and efficiency assessment from crop production-consumption process provided a new perspective for regional agricultural water management. An evaluation framework of water use efficiency (WUE) coupling crop cultivation, commutation and consumption processes was established in this paper. The impact of virtual water flow on provincial irrigation water use efficiency, and its implications for irrigation management were assessed based on the inter-provincial virtual irrigation water flow (VIWF) estimation for cereals of China The results showed that national IWU, IWP and IE for cereal production in 2018 were 268.89 Gm³ , 1.815 m³ /kg and 0.494 respectively. Total VIWF among 31 provinces was calculated to be 85.25 Gm³ , with the contributions of 43.8% rice, 40.0% wheat, and 16.2% maize. IWP and IE from the crop consumption perspective in all provinces were different from that observed from production perspective, and the effect of crop supply-demand mismatch on irrigation WUE was comprehensive. Virtual water flow was conducive to water resource conservation and irrigation WUE improvement when judged by IWP. However, the result was just the opposite when IE was used as the evaluation. Improving IWP in the North China Plain and Southeast and optimizing trade structure in Northeast and Southwest contribute to national irrigation water conservation from both of the production and consumption perspectives. The evaluation framework proposed in current paper can inspire the research on agricultural water assessment, management and regulation combining the physical and virtual water.
20 Cao, M.; Chen, Y.; Duan, W.; Li, Y.; Qin, J. 2022. Comprehensive evaluation of water–energy–food system security in the China–Pakistan economic corridor. Water, 14(12):1900. (Special issue: Water-Energy-Food Nexus Analysis for Sustainable Resources Management) [doi: https://doi.org/10.3390/w14121900]
Water resources ; Energy consumption ; Food security ; Food systems ; Nexus ; Economic development ; Sustainable development ; Policies ; Indicators ; Water use ; Tube wells ; Precipitation ; Evapotranspiration ; Models / China / Pakistan
(Location: IWMI HQ Call no: e-copy only Record No: H051187)
https://www.mdpi.com/2073-4441/14/12/1900/pdf?version=1655123720
https://vlibrary.iwmi.org/pdf/H051187.pdf
https://vlibrary.iwmi.org/pdf/H051187.pdf
(7.79 MB) (7.79 MB)
The safety of the water–energy–food (WEF) system in the China–Pakistan Economic Corridor (CPEC) is critical to the sustainable development of resources, the economy, and society in the region. This paper uses the projection pursuit model of a real-code accelerated genetic algorithm (RAGA-PP) to comprehensively evaluate the WEF system security of the CPEC for the period 2000–2016. The results show that from 2000 to 2016, the projection value of the WEF system was reduced from 2.61 to 0.53, and the overall system security showed a downward trend. Moreover, the CPEC increased by 6.13 × 107 people, resulting in a rapid decrease in per capita water resources and decreased security of the water resources subsystem. With the rising social and economic development in recent years, the per capita energy consumption has likewise risen, leading to a decline in the energy subsystem. At the same time, the per capita grain output in the study area has increased from 185 to 205 kg, and the safety of the food subsystem has been enhanced. However, the significant increase in irrigated areas (from 1.82 × 1010 to 1.93 × 1010 hectares) has further highlighted the contradiction between the supply and demand of surface water resources, and the number of tube wells increased by 7.23 × 105, resulting in the consumption of a large amount of electricity and diesel resources. The water–energy (WE) subsystem also became less safe. With the implementation of water resources management policies over the past few decades, the proportion of agricultural water consumption dropped from 95.06% in 2000 to 93.97% in 2016, and the safety of the water–food (WF) subsystem increased. Unfortunately, agricultural irrigation consumes a large amount of power resources, leading to a reduction in the security of the energy–food (EF) subsystem. The research results from the present study could provide a scientific basis for the coordinated development of WEF systems across the CPEC region.
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