Growth of an anthropogenic load on an environment in the second halfofXXth centuries has led to an exacerbation of many ecological problems. Today ecological risk scales cover territories of large regions. In this res...Growth of an anthropogenic load on an environment in the second halfofXXth centuries has led to an exacerbation of many ecological problems. Today ecological risk scales cover territories of large regions. In this respect the territory of Azerbaijan is not exception, within which Baku is noted by very adverse ecological conditions. Complex natural conditions （presence of strong winds, high air temperature and solar radiation） complicate the city ecological situation even greater. In modem conditions a construction boom relates to the factors aggravating the ecological situation of Baku. Last 10 years the city is rapidly built on by multistoried buildings which deform it, hinder visual contacts to the environment and obstruct the natural aeration of Baku amphitheater. The modem multistoried buildings erected ignoring town-planning norms do not correspond with regional climatic conditions, essentially modify the territory wind regime, hamper in surrounding buildings insolation, neglect a territory temperature-humidity conditions. As a result, it is necessary to use energy overly for their adaptation to Baku conditions and creation comfortable microclimate in them that leads to the city environmental pollution. The planning decisions and construction materials applied in these buildings are also alien to Baku climatic conditions. For qualitative transformation of Baku environment and improvement of ecological characteristics of the residential areas the author has carried out the estimation of the city territory on a complex of climatic factors （aeration, insolation and thermal-humidity regimes）. For these purposes the multidimensional statistical method is used. As a result the investigated territory of Baku is divided into 5 typological areas on climatic conditions. The brief characteristic and the general recommendations on transformation are worked out by the author for each of these typological units. Results of the research can be a basis for revealing of methods and principles of town-planning and architectural-planning organization of Baku residential areas.展开更多
Shrimp aquaculture is an important source of revenue for the state of Sarawak, Malaysia. However, there were concerns on the impact of shrimp farming on the mangrove ecosystem due to the discharge of shrimp pond water...Shrimp aquaculture is an important source of revenue for the state of Sarawak, Malaysia. However, there were concerns on the impact of shrimp farming on the mangrove ecosystem due to the discharge of shrimp pond water to the surrounding environment and potential self-pollution through the intake of surrounding water for the shrimp ponds. Therefore, the objectives of this study were to determine the water quality of the harvesting pond water and quantify the pollutants loadings. Samplings were conducted in three ponds and three channels near the pond outflow in a commercial shrimp farm during complete draining of water at harvest. Results indicated that TSS and Chl-a were high in both the ponds and channels. Total ammonia-nitrogen was the predominant form of the inorganic nitrogen and the mean values in both the ponds and channels were more than 1 mg/L which exceeded the maximum recommended for fish. Therefore, the water quality of the ponds and channel indicate that pond effluent should not be discharged directly into the surrounding environment but treated and nutrients recovered. Loads of total suspended solids, BODs, inorganic nitrogen, ammonia nitrogen, soluble reactive phosphorus and Chl-a of the effluent were quantified.展开更多
文摘Growth of an anthropogenic load on an environment in the second halfofXXth centuries has led to an exacerbation of many ecological problems. Today ecological risk scales cover territories of large regions. In this respect the territory of Azerbaijan is not exception, within which Baku is noted by very adverse ecological conditions. Complex natural conditions （presence of strong winds, high air temperature and solar radiation） complicate the city ecological situation even greater. In modem conditions a construction boom relates to the factors aggravating the ecological situation of Baku. Last 10 years the city is rapidly built on by multistoried buildings which deform it, hinder visual contacts to the environment and obstruct the natural aeration of Baku amphitheater. The modem multistoried buildings erected ignoring town-planning norms do not correspond with regional climatic conditions, essentially modify the territory wind regime, hamper in surrounding buildings insolation, neglect a territory temperature-humidity conditions. As a result, it is necessary to use energy overly for their adaptation to Baku conditions and creation comfortable microclimate in them that leads to the city environmental pollution. The planning decisions and construction materials applied in these buildings are also alien to Baku climatic conditions. For qualitative transformation of Baku environment and improvement of ecological characteristics of the residential areas the author has carried out the estimation of the city territory on a complex of climatic factors （aeration, insolation and thermal-humidity regimes）. For these purposes the multidimensional statistical method is used. As a result the investigated territory of Baku is divided into 5 typological areas on climatic conditions. The brief characteristic and the general recommendations on transformation are worked out by the author for each of these typological units. Results of the research can be a basis for revealing of methods and principles of town-planning and architectural-planning organization of Baku residential areas.
文摘Shrimp aquaculture is an important source of revenue for the state of Sarawak, Malaysia. However, there were concerns on the impact of shrimp farming on the mangrove ecosystem due to the discharge of shrimp pond water to the surrounding environment and potential self-pollution through the intake of surrounding water for the shrimp ponds. Therefore, the objectives of this study were to determine the water quality of the harvesting pond water and quantify the pollutants loadings. Samplings were conducted in three ponds and three channels near the pond outflow in a commercial shrimp farm during complete draining of water at harvest. Results indicated that TSS and Chl-a were high in both the ponds and channels. Total ammonia-nitrogen was the predominant form of the inorganic nitrogen and the mean values in both the ponds and channels were more than 1 mg/L which exceeded the maximum recommended for fish. Therefore, the water quality of the ponds and channel indicate that pond effluent should not be discharged directly into the surrounding environment but treated and nutrients recovered. Loads of total suspended solids, BODs, inorganic nitrogen, ammonia nitrogen, soluble reactive phosphorus and Chl-a of the effluent were quantified.
