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Nature and Science 0203 Nature and Science 2 (2 ),2004, ISSN 1545-0740 Nature and Science The Nature and Science is an international journal to enhance our natural and scientific knowledge spreading in the world under the free publication principle. Any valuable paper to describe natural phenomena/existence or report scientific researches/pursuits will be acceptable, including both natural and social sciences. Papers submitted could be reviews, objective descriptions, research reports, opinions/debates, news, letters, and all other information nature and science related. The journal is calling for papers and looking for more co-operators and editors. Editor-in-Chief: Hongbao Ma Associate Editors-in-Chief: Qiang Fu, Yongsheng Ma, Margaret Young Editors: George Chen, Mark Hansen, Mary Herbert, Wayne Jiang, Xuemei Liang, Tracy X. Qiao, George Warren, Kerry Watson, Qing Xia, Yonggang Xie, Ding Xu, Lijian Yang, Tina X. 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Box 753, East Lansing, Michigan 48826, The United States, (517) 862-6881 http://www.sciencepub.net [email protected] Nature and Science ( Quarterly, Started in 2003 ) Vol. 2 No.2 (Cumulated No.3) June 2004 CONTENTS 1 GIS Application In Watershed Management Yongsheng Ma 8 Applying Multivariate Auto-Regression Model to Forecast the Water Requirement of Well Irrigation Rice in Sanjiang Plain Qiang Fu, Zhenxiang Xing, Yongsheng Ma 15 Degradation of Organic Substance in Sewage with Functional Materials Made from Rare Earth Residue and Examination of Its Genetic Toxic on Aquatic Organism Ying Zhang, Shiying Liu, Nanqi Wen 20 The Study on the Application of Hydroquinone in Production of Lambs as Urease Inhibitor Yunfeng Bai, Qiang Fu, Jie Li 25 Analysis of Famines Caused by Heavy Floods and Droughts in China Yonggang Xie, Qiang Fu 33 An Objective Programming Method of Optimal Control on Population System Fulin Wang 36 Robust H∞ Filtering for LPV Discrete-Time State-Delayed Systems Junling Wang, Changhong Wang, Huijun Gao 45 Chaotic Analysis on Monthly Precipitation on Hills Region in Middle Sichuan of China Baohui Men, Xiejing Zhao, Chuan Liang 52 Study on the Preparation and Regeneration of Protoplast from Taxol-producing Fungus Nodulisporium sylviforme Kai Zhao, Dongpo Zhou, Wenxiang Ping, et al. 60 The Effect of Nitrogen Amount on Photosynthetic Rate of Sugar Beet Baiyan Cai, Jingping Ge 64 Alcohol Dehydrogenase from Bacillus subtilis : Cloning and Expression Gene in HD34 Beer Yeast Wenxiang Ping, Jingping Ge, Zhuangwei Lou, et al. 67 Preliminary study on the genetic diversity and differentiation of three Chinese Burguiera gymnorrhiza populations Jingping Ge, Baiyan Cai, Peng Lin, et al. 73 Effects of Inoculating Microbes on Nitrogen Form During the Municipal Solid Waste Compost Zimin Wei, Shiping Wang, Jinggang Xu, et al. 77 Application of Energy Approach to Estimating Scour Depth Xiaodong Zhang, Zhiping Liu, Chuan Liang, et al. 83 The Prediction of Rice Taste Value for the Post-drying Paddy Xianzhe Zheng 87 Structural Dynamics of Survival and competition of clonal plant populations in Stipa baicalensis Community Ruimin Hong , Yusheng Wang, Bo Tao, et al. Nature and Science, 2 (2) 2004, Ma, GIS Application In Watershed Management GIS Application In Watershed Management Yongsheng Ma (Research scholar, Institute of Water Research, Michigan State University, MI 48823) Abstract:Traditionally watersheds were spatial extents that capture rainwater. Recently it has been identified that unless the watersheds are not managed in an integrated sustainable manner, then not only the water resources but also other resources such as vegetation, fertile soil, fauna and flora get depleted. Rational management of upper and lower parts of a watershed is equally important for the sustenance of the environment. Therefore it is extremely important to use an integrated spatial approach for managing watersheds and river basins. The remote sensing and GIS for watershed management constitutes theoretical aspects of Geographic Information Systems (GIS) & Remote Sensing and their application for watershed management. [Nature and Science, 2004,2(2):1-7] and for boating, fishing and swimming. Wildlife also 1 Why is Watershed Important? needs healthy watersheds for food and shelter. effective and efficient way to sustain the local economy Watershed is an area, which catches the water and environmental health. from precipitation and then is drained by a river and its Scientists and leaders now recognize the best way tributaries. It is a “resource region” where the eco- to protect the vital natural resources is to understand system is closely interconnected around a basic and manage them on a watershed basis. Everything that resource - water. The watershed or river basin is is done in a watershed affects the watershed's system. therefore an ideal management unit. Ref. web site: The watershed provides a powerful study and http://www.srnr.arizona.edu/wsm/wsm462/EvesW management unit, which integrates ecological, ebPage.html geographical, geological, and cultural aspects of the land. The watershed is also a useful concept for 2 What Is GIS? integrating science with historical, cultural, economic, and political issues. Water (movement, cycling, use, GIS stands for geographic information system. An quality, etc.) provides a focus for integrating various information system is a computer program that aspects of watershed use and for making regional and manages data. A GIS, then, is a type of information global connections system that deals specifically with geographic, or Using the watershed concept, one can start with spatial, information.
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