The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Since 1980, the Lake Tahoe Interagency Monitoring Program (LTIMP) has provided stream‐discharge and water quality data—nitrogen (N), phosphorus (P), and suspended sediment—at more than 20 stations in Lake Tahoe Basin streams. To characterize the temporal and spatial patterns in nutrient and sediment loading to the lake, and improve the usefulness of the program and the existing database, we have (1)...
Chlorophyll a (Chl-a) is an indicator of water quality, especially of eutrophic state. Remote sensing has been used to mapping Chl-a in lake, large river, estuary and ocean, due to its advantages such as to provide data logistically and economically. The aim of this paper was to use LandSat TM image and suitable algorithm to estimate and map Chl-a concentration in reservoir Dajingshan, an important...
A lot of lakes or reservoirs have faced the problem of eutrophication in China, especially in Southern China. However, now it spreads to reservoirs and rivers in Northern China. An eutrophication control and algal bloom prevention system is outlined in this paper which based on the nature environment of the research waterbody and the eutrophied process control experiences. As a study case, Panjiakou...
As a major part of the Dianchi Lake, the Caohai Lake is in a serious eutrophication situation, which is imminent for pollution treatment. An improved floating bed, which called combined packing with emergent aquatic plants canna indica, submerged aquatic plants Hydrilla verticillata and aeration device, was used to purify the water taken from the Caohai Lake. Compared with the traditional floating...
The pollutants, which were brought by the living and producing of the village in Lake Baiyangdian, would have some effects on surrounding water quality. During May 2009 to March 2010, the research evaluated and analyzed the eutrophication state of five selected sampling points. Experimental result indicated that, the water around the village appeared eutrophication phenomenon overall, fish and poultry...
Lakes are very important in freshwater supply. At present, most of the lakes in the world are suffering from eutrophication with industrialization, economic growth, and human activities. Frequent monitoring and integrated management are necessary for lakes. Chlorophyll-a (chl-a) is the important indicator of phytoplankton and water quality. However, conventional methods for monitoring chl-a in lakes...
Based on the experiment of the phosphorus forms and the effect factors of phosphorus release from sediment in the urban shallow lake (taking Lake Xuanwu as a example), the results showed that when the water body had higher pH value during the excess alga period, phosphorus in the sediment was released deeply and the total dissolved phosphorus (TDP) was increased from 0.049 mg/L to 3.255 mg/L as 66...
After water storage of Laohutan reservoir, nitrogen (TN), total phosphorus (TP) and ammonia nitrogen (NH3-N) are the main pollutants. In the first month of water collection, the vertical distribution of TN, TP and NH3-N concentrations is increased distinctly from the surface layer to the bottom layer. It shows that the reservoir water quality is affected by pollutants released from submersed soil...
This research investigated the distribution of eutrophication degree in Nansi Lake using remote sensing data. Nine sampling points were monitored with Chla, TP and TN three parameters in upper lake of Nansi Lake. TSI of each sampling points was calculated using Carlsonpsilas TSIM. Then the linear model between remote sensing data and TSIM of each field monitoring points in upper lake of Nansi Lake...
On the basis of the hyperspectral data, the paper did research on the remote sensing monitoring of chlorophyll a and eutrophication of Chagan Lake using hyperspectral model put forward by Hongtao Duan (Northeast Institute of Geography and Agricultural Ecology). Based on the mature theory, the process of remote sensing was implemented by a system with the support of techniques of the second development...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.