نتایج جستجو برای: land quality

تعداد نتایج: 860420  

2015
Luca Salvati Ilaria Tombolini Roberta Gemmiti Andrea Colantoni Luigi Perini Marc A. Rosen

Land degradation has expanded in the Mediterranean region as a result of a variety of factors, including economic and population growth, land-use changes and climate variations. The level of land vulnerability to degradation and its growth over time are distributed heterogeneously over space, concentrating on landscapes exposed to high human pressure. The present study investigates the level of...

2014
Zahir Ali Jaap Zevenbergen Arbind Tuladhar

Land Information System is a tool for legal, administrative and economic decision making as well as an aid for planning and development. The present land administration system in Pakistan is entirely based on paper land records and maps lacking standards with outdated information stored at different administrative levels. Such practice restricts the usefulness of reliable and quality land infor...

2007
Anil K. Rajvanshi

Only 17.5 % of all Indian homes use LPG as their primary cooking fuel, with 90 % of rural households dependent on some form of biomass. To improve the quality of life of such a large number of people, it is imperative that clean and renewable alternatives are provided for cooking. This paper presents one such. An ethanol stove running on 50 % ethanol-water mixture has been developed at Nimbkar ...

Journal: :محیط شناسی 0
مریم حسین خواه دانشکده منابع طبیعی دانشگاه ارومیه گروه آموزشی مرتع و آبخیزداری مهدی عرفانیان عضو هیات علمی رسمی دانشکده منابع طبیعی دانشگاه ارومیه گروه آموزشی مرتع و آبخیزداری احمد علیجانپور دانشکده منابع طبیعی دانشگاه ارومیه گروه آموزشی جنگلداری

extended abstractintroductionin recent years, several studies around the world have shown that land use has a strong impact on water quality, and significant correlations exist between water quality parameters and land use types. generally land use types have adverse impacts on water quality, so positive relationships exist between percentages of these land use types and concentrations of water ...

Journal: :ISPRS Int. J. Geo-Information 2016
Jiadan Li Zhongchu Zhang Li-gang Ma Qing Gu Ke Wang Zhihao Xu

To investigate the effect of arable land protection policies in China, a practical framework that integrates geographic information systems (GIS), soil quality assessment and landscape metrics analysis was employed to track and analyze arable land transformations and landscape changes in response to rampant urbanization within the Ningbo region (China) from 2005 to 2013. The results showed that...

2006
C. A. Murphy B. L. Foster M. E. Ramspott K. P. Price

Management regimes of varying types and intensities can have profound impacts on grassland soil quality. Plus, there has recently been increased interest in finding soil quality indicators that are reflective of historical and current land management. We surveyed soil quality of privately owned grasslands in northeastern Kansas differing in their cultivation histories and current land-use (cool...

2017
Zhenghong Tang Elise Bright Samuel Brody

Local land use planning has profound impacts on environmental quality; however, few empirical studies have been conducted to systematically measure local land use plans’ environmental assessment quality and to identify the factors influencing it. This paper analyzes the quality of 40 Environmental Impact Reports (EIRs) of local jurisdictions’ land use plans in California. A plan evaluation prot...

As a common space, urban entrance is the first place that introduces a city to its visitors and it is imprinted in the memory of people. This study aims to provide a detailed analysis of physical development and activity patterns along the main entrance of Rasht, Iran. Utilized data in this research comes from a questionnaire survey through which 707 land lots along the main entrances were stu...

2016
Xiang Chen Weiqi Zhou Steward T. A. Pickett Weifeng Li Lijian Han

Rapid urbanization with intense land use and land cover (LULC) change and explosive population growth has a great impact on water quality. The relationship between LULC characteristics and water quality provides important information for non-point sources (NPS) pollution management. In this study, we first quantified the spatial-temporal patterns of five water quality variables in four watershe...

Journal: :محیط شناسی 0
علی سلاجقه دانشکدة منابع طبیعی دانشگاه تهران، دانشیار گروه احیا مناطق خشک و کوهستانی سمانه رضوی زاده دانشکدة منابع طبیعی دانشگاه تهران، کارشناس ارشد آبخیزداری و عضو باشگاه پژوهشگران جوان نعمت الله خراسانی دانشکدة منابع طبیعی دانشگاه تهران، استاد گروه محیط زیست مینا حمیدی فر کارشناس ارشد محیط زیست سوسن سلاجقه دانشکدة منابع طبیعی دانشگاه تهران ، دانشجوی کارشناسی ارشد محیط زیست

in the case of iran with arid and semiarid climate and lack of freshwater, pay attention to water quality and its effective factors is necessary. karkheh watershed is more than 5 million hectares in area and with biggest soil dam in asia, which has widespread land use changes in last decades. the most important factors of water volume and water resources reduction are aridity and improper land ...

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