نتایج جستجو برای: watershed protection
تعداد نتایج: 195570 فیلتر نتایج به سال:
Unsustainable development has often threatened watershed ecology in many parts of the world, and population growth played a major role this process. Our study consists management plan. The degradation environments by bushfire, timber exploitation, firewood harvesting dew soil pollutes spring water, addition, there are also negative impacts on physicochemical property soil. This research aims to...
Landscape ecological safety is of great significance in maintaining balance, protection, economic development, and promoting the sustainable use regional land resources. This study collects three-phase remote sensing (RS) image data 2000, 2010, 2020 to elucidate spatial temporal changes Guizhou Plateau Karst Watershed. We construct a landscape security index using ArcGIS pattern method. With au...
The salinization of surface water in a coastal context leads to qualitative degradation this resource by various sources anthropogenic and natural pollution. In context, we present the results comparative study using "DKPR" "RUSLE" models evaluate degree vulnerability against pollution, especially sub-watershed Joumouaa dam, hydraulic infrastructure providing drinking for Targuist city. model a...
Precipitation is very important to the formation of runoff, and studying of runoff variation and its response to precipitation has practical significance to sustainable utilization of water resources. The study used Mann-Kendall test, anomaly accumulation method, and precipitation elasticity of runoff method to analyze the changes in the relation of precipitation and runoff and the contribution...
In this paper, we investigate the links between the flooding paradigm and the topological watershed. Guided by the analysis of a classical flooding algorithm, we present several notions that lead us to a better understanding of the watershed: minima extension, mosaic, pass value and separation. We first make a detailed examination of the effectiveness of the divide set produced by watershed alg...
Watershed transform is a key operator in video segmentation algorithms. However, the computation load of watershed transform is too large for real-time applications. In this paper, a new fast watershed algorithm, named P-Watershed, for image sequence segmentation is proposed. By utilizing the temporal coherence property of the video signal, this algorithm updates watersheds instead of searching...
This paper is an overview of this special issue devoted to watershed research in Acadia National Park (Acadia NP). The papers address components of an integrated research program on two upland watersheds at Acadia NP, USA (44 degrees 20' N latitude; 68 degrees 15' E longitude). These watersheds were instrumented in 1998 to provide a long-term foundation for regional ecological and watershed res...
The shrinking Baiyangdian Lake and drying up rivers are widely observed in recent years. Due to the significant advantages in integrated analyses of natural and economic systems, emergy analysis is introduced in this paper to assess the health status of Baiyangdian Watershed. First, we establish a emergy based conceptual framework for the assessment, delineate an emergy flow diagram of Baiyangd...
In fall (November 2005) and winter (February 2006), we collected current-year foliage of native red spruce (Picea rubens Sarg.) growing in a reference watershed and in a watershed treated in 1999 with wollastonite (CaSiO(3), a slow-release calcium source) to simulate preindustrial soil calcium concentrations (Ca-addition watershed) at the Hubbard Brook Experimental Forest (Thornton, NH). We ana...
4 Watershed modeling requires accurate estimates of precipitation, however in some cases 5 it is necessary to simulate streamflow in a watershed for which there is no precipitation gauge 6 records within close proximity to the watershed. For such cases, we propose an approach for 7 estimating watershed-scale precipitation by combining (or fusing) gauge-based precipitation 8 time series with rad...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید