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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Hydro-environment : Research on ecosystem model of xian yanming lake
Research on ecosystem model of xian yanming lake
Author : WANG YING£¬ZHOU XIAODE£¬YANG JING
Abstract
Yanming Lake located in Chanba Ecological District of Xi'an, is formed by 5 artificial lakes; Yanming
Lake was constructed for improvement of ecological environment in east areas of Xi'an. Recently, the
nitrogen and phosphorus of the lake are increase and the submerged plants (Myriophyllum) are
growing widely. The excessive growth of Myriophyllum forms the canopy in water surface and has
covered almost 70% of waters areas of the lake. With the problem of submerged plants
£¨Myriophyllum£©growth largely influencing natural landscape in Xi'an Yanming Lake, the paper
carries out the simulation and prediction of the influences on the concentrations of Chla, TP and TN
when the hydrophyte¡¯s biomass is decreasing. Based on the Lotka-Volterra model and the Vollenweider
model, the Ecosystem model of Xi'an Yanming Lake was established and used to describe the
interactions and relations among the water plants, the algae, the total phosphorus and the total nitrogen
in the lake water. The four state variables are respectively water plant biomass, chlorophyll
concentration, total phosphorus concentration and total nitrogen concentration. The aquatic plants,
floating algae relations with dynamic change and interaction of nutrients in the lake has been verified
with the field data, the result shows that the calculation value can fit the actual value well.
File Size : 233,545 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 17/08/2015
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