Your search found 30 records
1 Wang, Y.; Wu, W. 1993. The influence of human interference on river environment. In Nile 2002 Conference - Comprehensive Water Resources Development of the Nile Basin: Getting started: Proceedings, Aswan, Egypt, 1-6 February 1993. pp.VI-5:1-13.
(Location: IWMI-HQ Call no: 333.91 G232 NIL Record No: H012464)
2 Murrell, P.; Wang, Y.. 1993. When privatization should be delayed: The effect of communist legacies on organizational and institutional reforms. Journal of Comparative Economics, 17(2):385-406.
(Location: IWMI-HQ Call no: P 2915 Record No: H013367)
3 Wang, Y.; Tamai, N. 1993. Multiobjective planning for multireservoir systems with stochastic inflows. In Tingsanchali, T. (Ed.), Proceedings of the International Conference on Environmentally Sound Water Resources Utilization, Bangkok, Thailand, 8-11 November 1993. Vol.1. Bangkok, Thailand: AIT. pp.II-258-265.
(Location: IWMI-HQ Call no: 333.91 G000 TIN Record No: H015806)
4 Wang, Y.; Woodcock, C. E.; Buermann, W.; Stenberg, P.; Voipio, P.; Smolander, H.; Häme, T.; Tian, Y.; Hu, J.; Knyazikhin, Y.; Myneni, R. B. 2004. Evaluation of the MODIS LAI algorithm at a coniferous forest site in Finland. Remote Sensing of Environment, 91:114-127.
(Location: IWMI-HQ Call no: P 6856 Record No: H034583)
5 Chang, J.; Huang, Q.; Wang, Y.. 2004. Water distribution control model in the Yellow River basin. Water International, 29(4):483-491.
(Location: IWMI-HQ Call no: PER Record No: H036716)
6 Chen, X.; Shi, C.; Wang, Y.; Zhang, H.; Wang, D. 2004. Sustainable water dispatching for the lower reaches of the Yellow River in non-flood seasons. Water International, 29(4):492-498.
(Location: IWMI-HQ Call no: PER Record No: H036717)
7 Wang, Y.; Wang, H. 2005. Sustainable use of water resources in agriculture in Beijing: problems and countermeasures. Water Policy, 7(4):345-357.
(Location: IWMI-HQ Call no: PER Record No: H037401)
8 Guo, S.; Chen, H.; Zhang, H.; Xiong, L.; Liu, P.; Pang, B.; Wang, G.; Wang, Y.. 2005. A semi-distributed monthly water balance model and its application in a climate change impact study in the Middle and Lower Yellow River Basin. Water International, 30(2):250-260.
River basins ; Water balance ; Models ; Runoff ; Evapotranspiration ; GIS ; Climate change / China / Yellow River
(Location: IWMI-HQ Call no: PER Record No: H037855)
9 Wang, Y.; Xie, Z. K.; Li, F.; Zhang, Z. 2004. The effect of supplemental irrigation on watermelon (Citrullus lanatus) production in gravel and sand mulched fields in the Loess Plateau of northwest China. Agricultural Water Management, 69(1):29-41.
Supplementary irrigation ; Water use efficiency ; Evapotranspiration ; Water harvesting ; Soil water ; Yields ; Cost benefit analysis / China / Loess Plateau
(Location: IWMI-HQ Call no: PER Record No: H035686)
10 Xie, Z.; Wang, Y.; Li, F. 2005. Effect o plastic mulching on soil water use and spring wheat yield in arid region of northwest China. Agricultural Water Management, 75(1):71-83.
(Location: IWMI-HQ Call no: PER Record No: H036922)
11 Xie, Z.; Wang, Y.; Jiang, W.; Wei, X. 2006. Evaporation and evapotranspiration in a watermelon field mulched with gravel of different sizes in northwest China. Agricultural Water Management, 81(1-2):173-184.
Evaporation ; Evapotranspiration ; Watermelons ; Yields ; Mulching ; Watermelons ; Water use efficiency / China
(Location: IWMI-HQ Call no: PER Record No: H038444)
12 Xie, J.; Zhang, K.; Hu, L.; Pavelic, Paul; Wang, Y.; Chen, M. 2015. Field-based simulation of a demonstration site for carbon dioxide sequestration in low-permeability saline aquifers in the Ordos Basin, China. Hydrogeology Journal, 23(7):1465-1480. [doi: https://doi.org/10.1007/s10040-015-1267-9]
Carbon dioxide ; Carbon sequestration ; Saline water ; Aquifers ; River basins ; Geological process ; Reservoir storage ; Wells ; Temperature ; Porosity ; Permeability / China / Ordos Basin
(Location: IWMI HQ Call no: e-copy only Record No: H047063)
(3.84 MB)
Saline formations are considered to be candidates for carbon sequestration due to their great depths, large storage volumes, and widespread occurrence. However, injecting carbon dioxide into low-permeability reservoirs is challenging. An active demonstration project for carbon dioxide sequestration in the Ordos Basin, China, began in 2010. The site is characterized by a deep, multi-layered saline reservoir with permeability mostly below 1.0×10-14 m2. Field observations so far suggest that only small-to-moderate pressure buildup has taken place due to injection. The Triassic Liujiagou sandstone at the top of the reservoir has surprisingly high injectivity and accepts approximately 80 % of the injected mass at the site. Based on these key observations, a three-dimensional numerical model was developed and applied, to predict the plume dynamics and pressure propagation, and in the assessment of storage safety. The model is assembled with the most recent data and the simulations are calibrated to the latest available observations. The model explains most of the observed phenomena at the site. With the current operation scheme, the CO2 plume at the uppermost reservoir would reach a lateral distance of 658 m by the end of the project in 2015, and approximately 1,000 m after 100 years since injection. The resulting pressure buildup in the reservoir was below 5 MPa, far below the threshold to cause fracturing of the sealing cap (around 33 MPa).
13 Hu, H. -y.; Zhang, L.; Wang, Y.. 2016. Crop development based assessment framework for guiding the conjunctive use of fresh water and sewage water for cropping practice - a case study. Agricultural Water Management, 169:98-105. [doi: https://doi.org/10.1016/j.agwat.2016.02.017]
Crop production ; Freshwater ; Sewage ; Wastewater treatment ; Wastewater irrigation ; Water use ; Conjunctive use ; Crop yield ; Assessment ; Phytotoxicity ; Bioassays ; Risk management ; Case studies / China / Xiamen
(Location: IWMI HQ Call no: e-copy only Record No: H047496)
(1.18 MB)
Sewage dilution and formulated fertilization are cost-effective to avoid sewage-deriving phytotoxicity stress and excess fertilizer application in agricultural sewage irrigation practice. However, it is hard for us to fix the parameters of sewage dilution ratio (SDR) and fertilization formula exactly for the best management of sewage irrigation practice according to those published guidelines. This paper presented such an assessment framework. The assessment tools in the framework consist of four consecutive sewage irrigation experiments, which include germination test, seedling test and cropping test for assessing sewage-deriving phytotoxicity stress in different crop development stages, and DRIS test for diagnosing crop nutrient deficiency. The framework is further verified with crop kale (Brassica oleracea L. var. acephala D.C.) under different pre-set SDR values. The results of germination, seedling and cropping tests can significantly reflect the change of sewage-deriving phytotoxicity with both SDR gradient and crop development stages. Furthermore, the results of DRIS test show that sewage irrigation causes the deficiency of N and P nutrients relative to K nutrient in crop kale. Finally, according to these test results, SDR values and fertilization formula are optimized for guiding the conjunctive use of sewage and fresh water in cropping practice. The framework is thus a best management tool supplementary for those published guidelines to enhance the efficiency and feasibility of agricultural sewage reuse.
14 Cardenas, J.-C.; Janssen, M. A.; Ale, M.; Bastakoti, Ram; Bernal, A.; Chalermphol, J.; Gong, Y.; Shin, H.; Shivakoti, G.; Wang, Y.; Anderies, J. M. 2017. Fragility of the provision of local public goods to private and collective risks. Proceedings of the National Academy of Sciences of the United States of America, 114(5):921-925. [doi: https://doi.org/10.1073/pnas.1614892114]
Small scale farming ; Agricultural production ; Investment ; Food production ; Food security ; Rice ; Local communities ; Climate change ; Private sector ; Economic aspects ; Economic systems ; Market economics ; Smallholders ; Risk management
(Location: IWMI HQ Call no: e-copy only Record No: H047982)
http://www.pnas.org/content/early/2017/01/11/1614892114.full.pdf?sid=d3783b22-9c9e-4b02-ac30-a7944b47c376
https://vlibrary.iwmi.org/pdf/H047982.pdf
https://vlibrary.iwmi.org/pdf/H047982.pdf
(1.04 MB)
Smallholder agricultural systems, strongly dependent on water resources and investments in shared infrastructure, make a significant contribution to food security in developing countries. These communities are being increasingly integrated into the global economy and are exposed to new global climate-related risks that may affect their willingness to cooperate in community-level collective action problems. We performed field experiments on public goods with private and collective risks in 118 small-scale rice-producing communities in four countries. Our results indicate that increasing the integration of those communities with the broader economic system is associated with lower investments in public goods when facing collective risks. These findings indicate that local public good provision may be negatively affected by collective risks, especially in communities more integrated with the market economy.
15 Grafton, R. Q.; Williams, J.; Perry, C. J.; Molle, F.; Ringler, C.; Steduto, P.; Udall, B.; Wheeler, S. A.; Wang, Y.; Garrick, D.; Allen, R. G. 2018. The paradox of irrigation efficiency: higher efficiency rarely reduces water consumption. Science, 361(6404):748-750. [doi: https://doi.org/10.1126/science.aat9314]
Irrigation efficiency ; Water use ; Irrigation methods ; Sprinkler irrigation ; Drip irrigation ; Surface irrigation ; Water accounting ; Water policy ; Watersheds ; River basins ; Crop production
(Location: IWMI HQ Call no: e-copy only Record No: H049033)
(1.42 MB)
Reconciling higher freshwater demands with finite freshwater resources remains one of the great policy dilemmas. Given that crop irrigation constitutes 70% of global water extractions, which contributes up to 40% of globally available calories (1), governments often support increases in irrigation efficiency (IE), promoting advanced technologies to improve the “crop per drop.” This provides private benefits to irrigators and is justified, in part, on the premise that increases in IE “save” water for reallocation to other sectors, including cities and the environment. Yet substantial scientific evidence (2) has long shown that increased IE rarely delivers the presumed public-good benefits of increased water availability. Decision-makers typically have not known or understood the importance of basin-scale water accounting or of the behavioral responses of irrigators to subsidies to increase IE. We show that to mitigate global water scarcity, increases in IE must be accompanied by robust water accounting and measurements, a cap on extractions, an assessment of uncertainties, the valuation of trade-offs, and a better understanding of the incentives and behavior of irrigators.
16 Wang, M.; Tang, T.; Burek, P.; Havlik, P.; Krisztin, T.; Kroeze, C.; Leclere, D.; Strokal, M.; Wada, Y.; Wang, Y.; Langan, Simon. 2019. Increasing nitrogen export to sea: a scenario analysis for the Indus River. Science of the Total Environment, 694:133629. [doi: https://doi.org/10.1016/j.scitotenv.2019.133629]
Water pollution ; Sea pollution ; Chemical contamination ; Nitrogen ; River basins ; International waters ; Agricultural wastes ; Human wastes ; Climate change ; Nutrient management ; Socioeconomic development ; Models ; Estimation / Pakistan / India / China / Afghanistan / Indus River
(Location: IWMI HQ Call no: e-copy only Record No: H049540)
(2.41 MB)
The Indus River Basin faces severe water quality degradation because of nutrient enrichment from human activities. Excessive nutrients in tributaries are transported to the river mouth, causing coastal eutrophication. This situation may worsen in the future because of population growth, economic development, and climate change. This study aims at a better understanding of the magnitude and sources of current (2010) and future (2050) river export of total dissolved nitrogen (TDN) by the Indus River at the sub-basin scale. To do this, we implemented the MARINA 1.0 model (Model to Assess River Inputs of Nutrients to seAs). The model inputs for human activities (e.g., agriculture, land use) were mainly from the GLOBIOM (Global Biosphere Management Model) and EPIC (Environmental Policy Integrated Model) models. Model inputs for hydrology were from the Community WATer Model (CWATM). For 2050, three scenarios combining Shared Socio-economic Pathways (SSPs 1, 2 and 3) and Representative Concentration Pathways (RCPs 2.6 and 6.0) were selected. A novelty of this study is the sub-basin analysis of future N export by the Indus River for SSPs and RCPs. Result shows that river export of TDN by the Indus River will increase by a factor of 1.6–2 between 2010 and 2050 under the three scenarios. N90% of the dissolved N exported by the Indus River is from midstream sub-basins. Human waste is expected to be the major source, and contributes by 66–70% to river export of TDN in 2050 depending on the scenarios. Another important source is agriculture, which contributes by 21–29% to dissolved inorganic N export in 2050. Thus a combined reduction in both diffuse and point sources in the midstream sub-basins can be effective to reduce coastal water pollution by nutrients at the river mouth of Indus.
17 Gao, F.; Wang, Y.; Zhang, Y. 2020. Evaluation of the crosta method for the retrieval of water quality parameters from remote sensing data in the Pearl River Estuary. Water Quality Research Journal, 55(2):209-220. [doi: https://doi.org/10.2166/wqrj.2020.024]
Rivers ; Estuaries ; Water quality ; Parameters ; Remote sensing ; Satellite imagery ; Landsat ; Thematic mapper ; Sediment ; Coastal waters ; Principal component analysis ; Models / China / Pearl River Estuary
(Location: IWMI HQ Call no: e-copy only Record No: H049885)
https://iwaponline.com/wqrj/article-pdf/55/2/209/709563/wqrjc0550209.pdf
https://vlibrary.iwmi.org/pdf/H049885.pdf
https://vlibrary.iwmi.org/pdf/H049885.pdf
(0.65 MB) (668 KB)
In recent decades, many algorithms have been developed for the retrieval of water quality parameters using remotely sensed data. However, these algorithms are specific to a certain geographical area and cannot be applied to other areas. In this study, feature-orientated principal component (PC) selection, based on the Crosta method and using Landsat Thematic Mapper (TM) for the retrieval of water quality parameters (i.e., total suspended sediment concentration (TSM) and chlorophyll a (Chla)), was carried out. The results show that feature-orientated PC TSM, based on the Crosta method, obtained a good agreement with the MERIS-based TSM product for eight Landsat TM images. However, the Chla information, selected using the feature-orientated PC, has a poor agreement with the MERIS-based Chla product. The accuracy of the atmospheric correction method and MERIS product may be the main factors influencing the accuracy of the TSM and Chla information identified by the Landsat TM images using the Crosta method. The findings of this study would be helpful in the retrieval of spatial distribution information on TSM from the long-term historical Landsat image archive, without using coincident ground measurements.
18 Wang, X.; Chen, Y.; Li, Z.; Fang, G.; Wang, Y.. 2020. Development and utilization of water resources and assessment of water security in Central Asia. Agricultural Water Management, 240:106297. (Online first) [doi: https://doi.org/10.1016/j.agwat.2020.106297]
Water resources development ; Water security ; Assessment ; Agriculture ; Water use ; Water supply ; Water demand ; International waters ; River basins ; Ecological factors ; Socioeconomic environment ; Indicators ; Forecasting ; Models / Central Asia / Kazakhstan / Kyrgyzstan / Tajikistan / Turkmenistan / Uzbekistan
(Location: IWMI HQ Call no: e-copy only Record No: H049902)
(2.23 MB)
The utilization of water resources and water security in Central Asia are critical to the stability of the region. This paper assesses the water security of the five Central Asian countries (Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan) by using the projection pursuit model based on particle swarm optimization (PSO-PEE). The results show that the average annual water consumption in Central Asia is about 1255.57 × 108 m3, and the proportion of agricultural water consumption decreased due in large part to the changes of crop planting structure. For the ecological security, Kazakhstan, Tajikistan and Kyrgyzstan have improved their status, but Turkmenistan is getting worse. For the quantity security of water resources, Tajikistan and Kyrgyzstan are relatively safe, whereas Uzbekistan is at risk. For the socio-economic conditions, Kazakhstan scored the highest, while Tajikistan and Uzbekistan scored the lowest, water consumption per 10,000 dollars of GDP across all five countries is relatively high but shows a significant decreasing trend. For the water supply and demand security, the status of Kazakhstan, Kyrgyzstan and Tajikistan are better than that of Turkmenistan and Uzbekistan. Kazakhstan has achieved a relatively safe level (level ) and the degree of water security is high. Kyrgyzstan, Tajikistan and Turkmenistan are only in the basically safe level (level III). Uzbekistan is under significant pressure with regard to water security (level IV), which indicates that the country needs to strictly control population growth and strengthen the comprehensive management of water resources.
19 Li, C.; Gan, Y.; Zhang, C.; He, H.; Fang, J.; Wang, L.; Wang, Y.; Liu, J. 2021. "Microplastic communities" in different environments: differences, links, and role of diversity index in source analysis. Water Research, 188:116574. [doi: https://doi.org/10.1016/j.watres.2020.116574]
Microplastics ; Communities ; Freshwater ecosystems ; Marine environment ; Sea water ; Sediment ; Soil pollution ; Water pollution ; Polymers ; Risk assessment / China
(Location: IWMI HQ Call no: e-copy only Record No: H050135)
(2.95 MB)
Microplastics have been detected in various environments, yet the differences between microplastics in different environments are still largely unknown. Scientists have proposed the concept of the “microplastic cycle,” but the evidence for the movement of microplastics between different environments is still scarce. By screening the literature and extracting information, we obtained microplastic data from 709 sampling sites in freshwater, seawater, freshwater sediment, sea sediment, and soil in China. Based on the similarity between microplastics and biological communities, here we propose the concept of a “microplastic community” and examine the differences, links, and diversity of microplastic communities in different environments. Wilcoxon sign-ranks test, Kruskal-Wallis test, and analysis of similarities (ANOSIM) showed that there were significant differences in abundance, proportion of small microplastics, and community composition (shape, color, and polymer types) of microplastics in different environments. The Mantel test showed that there were significant correlations between microplastic community composition in different environments. Network analysis based on community similarity further confirmed the links between microplastic communities. The distance decay models revealed that the links weakened with the increase of geographic distance, suggesting that sampling sites with closed geographical locations had similar pollution sources and more easily to migrate or exchange microplastics. The microplastic diversity integrated index (MDII) was established based on the diversity of microplastic shape, color, and polymer types, and its indication of the number of microplastic pollution sources was verified by the statistical fitting relationship between the number of industrial pollution sources and MDII. Our study provides new insight into the differences and links between microplastics in different environments, which contributes to the microplastic risk assessment and demonstrates the “microplastic cycle.” The establishment of the microplastic diversity integrated index could be used in source analysis of microplastics.
20 Chai, Y.; Zhang, H.; Luo, Y.; Wang, Y.; Zeng, Y. 2021. Payments for ecosystem services programs, institutional bricolage, and common pool resource management: evidence from village collective-managed irrigation systems in China. Ecological Economics, 182:106906. (Online first) [doi: https://doi.org/10.1016/j.ecolecon.2020.106906]
Payments for ecosystem services ; Irrigation systems ; Collective action ; Resource management ; Institutions ; Villages ; Government ; Water allocation ; Infrastructure ; Economic aspects ; Environmental impact ; Benefits ; Equity ; Policies ; Households ; Communities / China / Guangdong / Xuwen
(Location: IWMI HQ Call no: e-copy only Record No: H050237)
(0.86 MB)
This study investigates the effect of payments for ecosystem services (PES) programs on common pool resource management in the context of village collective-managed irrigation systems (VMISs) in China. Drawing on institutional bricolage theory, we propose that the functioning of a PES program depends on its combination with local institutions. We infer transaction cost-reduction and trust-strengthening mechanisms as the two pathways for institutional bricolage to illustrate the process whereby a PES program enables a VMIS to internalise positive externalities. Based on data from a field survey at the household level, our empirical results confirm that a PES program is an effective means of improving the performance of VMISs in terms of environmental, economic, and equitable benefits, because it aligns benefits for the village collective with those for the overall society. We conclude that a PES program is of greater benefit to communities with local institutions and that PES programs and local institutions exert an interactive impact as they reinforce each other's effect on common pool resource management.
Powered by DB/Text WebPublisher, from
