نتایج جستجو برای: pishkouh watershed

تعداد نتایج: 16406  

2014
Anupam Khajuria Sayaka Yoshikawa Shinjiro Kanae

Watershed management consists of multifunctional activities to manage and address the increasing water resource problems. Ever increasing water demand and rapidly depleting water resources, it has become necessary to develop the adaptation options to recharge groundwater resources. A watershed is a special kind of Common Pool Resources (CPRs); an area is defined by hydrological linkages where o...

2002
Roberto de Alencar Lotufo Alexandre X. Falcão Francisco A. Zampirolli

Abstract. The watershed transform and the morphological reconstruction are two of the most important operators for image segmentation in the framework of mathematical morphology. In many situations, the segmentation requires the classical watershed transform of a reconstructed image. In this paper, we introduce the IFT-watershed from gray scale marker a method to compute at same time, the recon...

2005
Qiuwen Zhang Cheng Wang Ryosuke Shibasaki

This paper proposes the concept and framework of digital watershed which is divided into three levels such as visual information platform, thematic application system and comprehensive decision-making support system. The construction of distributed hydrology model(DHM) based on digital watershed are discussed. It is shown that digital watershed makes it possible to construct DHM with the real m...

2003
A. Sankarasubramanian Richard M. Vogel

[1] The overall water balance and the sensitivity of watershed runoff to changes in climate are investigated using national databases of climate and streamflow for 1,337 watersheds in the U.S. We document that 1% changes in precipitation result in 1.5–2.5% changes in watershed runoff, depending upon the degree of buffering by storage processes and other factors. Unlike previous research, our ap...

2009
W. J. Gburek

The Cannonsvifle Reservoir watershed is a major component of the unfiltered New York City water suppiy system. The voluntary, incentive-based Watershed Agricultural Program is a collaborative effort among producers, federal, state, and local organizations to address the problem of phosphorus loading effects on water quality through implementation of whole-farm plans. The effectiveness of select...

2009
Michael Hanselmann Ullrich Köthe Bernhard Y. Renard Marc Kirchner Ron M. A. Heeren Fred A. Hamprecht

Watershed segmentation of spectral images is typically achieved by first transforming the high-dimensional input data into a scalar boundary indicator map which is used to derive the watersheds. We propose to combine a Random Forest classifier with the watershed transform and introduce three novel methods to obtain scalar boundary indicator maps from class probability maps. We further introduce...

2000

When developing a watershed plan, it is useful to consider how watersheds are configured. The term management unit is used to describe watersheds and their smaller segments. The two management units that will be focused upon in this handbook are the watershed and the subwatershed. A watershed can be defined as the land area that contributes runoff to a particular point along a waterway. A typic...

2009
LEONARD F. DEBANO LARRY J. SCHMIDT

-Sensitive hydrologic interrelationships exist between watershed condition and the health of associated riparian areas in the southwestern USA. The impact of extensive unmanaged livestock grazing, wildfires, and past forest clearing, coupled with numerous small linear perturbations such as travelways, low standard roads, and livestock trails, has dramatically illustrated the interrelationship b...

2011
Jobin Christ

Problem statement: Segmentation plays an important role in medical imaging. Segmentation of an image is the division or separation of the image into dissimilar regions of similar attribute. In this study we proposed a methodology that integrates clustering algorithm and marker controlled watershed segmentation algorithm for medical image segmentation. The use of the conservative watershed algor...

2008
Yi Zheng Arturo A. Keller

Systematic consideration of uncertainty in data, model structure, and other factors is generally unaddressed in most Total Maximum Daily Load (TMDL) calculations. Our previous studies developed the Management Objectives Constrained Analysis of Uncertainty (MOCAU) approach as an uncertainty analysis technique specifically for watershed water quality models, based on a synthetic case. In this stu...

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