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- W2413661806 abstract "This study summarizes the successional development and testing of forest hydrologic models based on DRAINMOD that predicts the hydrology of low-gradient poorly drained watersheds as affected by land management and climatic variation. The field scale (DRAINLOB) and watershed-scale in-stream routing (DRAINWAT) models were successfully tested with water table and outflow data from a 25 ha, 340 ha, 2950 ha forested watersheds and an 8 140 ha mixed land use watershed in North Carolina (NC), USA. Results of linking DRAINWAT with a simple in-stream nitrogen transport model with a first order decay rate indicated its potential use as a tool for estimating N losses from the poorly drained coastal watersheds. INTRODUCTION Large areas of forested wetlands in the Southeastern coastal plain of the U.S. were developed or altered prior to 1980 by providing artificial drainage for agriculture and more intensive silviculture (Amatya et a1 1997). In recent years there has been a great deal of concern about both the large quantities of fi-esh water outflows and quality of water drained from these lands, which are located adjacent to nutrient sensitive rivers and estuaries. In order to quantifL the interactions and cumulative impacts of many processes and parameters affecting hydrology and water quality fkom these lands, researchers have developed models that are capable of simulating the hydrology, including the routing of flows and pollutant loads through a network of drainage canals and natural streams. When successfully developed and tested, such models can be used to identi@ combinations of practices that will enhance productivity and reduce environmental impacts (Heatwole et a1 1987, Skaggs 1999, McCarthy & Skaggs 1992, Amatya et a1 2003). However, most of the models have been developed for the upland watersheds with different hydrologic and in-stream hydraulic processes compared to lowgradient poorly drained lands of the lower coastal plains. The main objective of this paper is to summarize the successional development and testing of DRAINMOD (Skaggs 1978) based field and watershed-scale hydrologic models on four different low-gradient predominantly forested watersheds of various sizes and with varying management practices in coastal North Carolina (NC) in U.S.A. MATERIALS AND METHODS Site description The first study site (Dl ) called is located in Carteret County, NC, USA (Fig. 1.). This is one (control) of the three artificially drained experimental watersheds, each about 25 ha in size, planted to loblolly pine (Pinus taeda L.) in 1974. Watershed Boundary ,--....-----L --." @default.
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- W2413661806 date "2005-01-01" @default.
- W2413661806 modified "2023-09-27" @default.
- W2413661806 title "Modeling hydrology and in-stream transport on drained forested lands in coastal Carolinas, U.S.A." @default.
- W2413661806 hasPublicationYear "2005" @default.
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