نتایج جستجو برای: soil land scape

تعداد نتایج: 282775  

2005
G. A. Chapman M. A. Young J. M. Gray

Soil landscape mapping is a regional planning tool that identifies soil and landscape constraints to development from natural resource management and engineering view points. Currently, this dataset is the only one available for identifying land capability in its broadest sense. More detailed soil landscape information at the hillslope facet level is necessary to identify specific urban and rur...

2004
B. J. FU Q. H. MENG Y. QIU W. W. ZHAO Q. J. ZHANG D. A. DAVIDSON

This study examines the effects of land use and slope angle on runoff, soil loss and nitrogen loss from hillslopes of the Loess Plateau in China. Farmland, wasteland and four forest treatments (sea buckthornþ poplar, immature sea buckthorn, mature sea buckthorn, and immature Chinese pine) were the types of land use that were compared. The results showed that July was the critical period for run...

Journal: :journal of agricultural science and technology 2012
k. a. sultan f. ziadat

sustainable management of limited land and water resources is urgently needed to meet the increasing demand for food and to protect the environment. land suitability analysis is a prerequisite in assessing and proposing sustainable land use alternatives for an area. soil data are usually available at different levels of detail and stored in various forms, usually soil maps and/or soil observati...

2013
Xiaobo Yi Li Wang

In order to reduce soil erosion and desertification, the Sloping Land Conversion Program has been conducted in China for more than 15 years, and large areas of farmland have been converted to forest and grassland. However, this large-scale vegetation-restoration project has faced some key problems (e.g. soil drying) that have limited the successful development of the current ecological-recovery...

2001
Jeffrey P. Walker Paul R. Houser

Because of its long-term persistence, accurate initialization of land surface soil moisture in fully coupled global climate models has the potential to greatly increase the accuracy of climatological and hydrological prediction. To improve the initialization of soil moisture in the NASA Seasonal-to-Interannual Prediction Project (NSIPP), a onedimensional Kalman filter has been developed to assi...

2009
Shengping Wang Zhiqiang Zhang Ge Sun Steven G. McNulty Manliang Zhang

Soil conservation practices have been widely implemented on the Loess Plateau to reduce severe soil erosion in north-central China over the past three decades. However, the hydrologic impacts of these practices are not well documented and understood. The objective of this study was to examine how water yield has changed after implementing soil conservation practices that resulted in changes in ...

2014
Ying Zhang

This publication has been produced with the assistance of the European Union. The contents of this publication are the sole responsibility of ECRAN and can in no way be taken to reflect the views of the European Union. Executive summary • Soil degradation, including soil erosion, land desertification, soil salinisation, soil impoverishment and soil pollution, has become more and more serious in...

2003
Jun Wen Zhongbo Su Yaoming Ma

[1] An analytical algorithm for the determination of land surface temperature and soil moisture from the Tropical Rainfall Measuring Mission/Microwave Imager (TRMM/TMI) remote sensing data has been developed in this study. The error analyses indicate that the uncertainties of the enrolled parameters will not cause serious errors in the proposed algorithm. By applying the proposed algorithm to T...

2004
J. Post V. Krysanova F. Suckow

To investigate effects of different land use management practices on carbon fluxes at the regional scale we developed an integrated model by coupling an ecohydrological river basin model SWIM (Soil and Water Integrated Model) and a soil organic matter model SCN (Soil-Carbon-Nitrogen model). The latter is a submodel of the forest growth model 4C. The extended integrated model combines hydrologic...

2007
Robie Anson

Officials with the Long Island Sound Study (LISS) are presently reviewing the suite of indicators used to assess and report on Long Island Sound's ecological health and the programmatic success of the LISS. As part of this evaluation, managers seek to determine whether there are environmental variables that offer valuable information on ecosystem condition but that have not historically been tr...

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