3 results about "Agricultural pollution" patented technology

The application discloses an agricultural water quality and water quantity dual risk and cascade transmission evaluation method, belongs to the technical field of water resource management, and aims at solving the problem that traditional methods only stay in water quantity depletion caused water resource pressure accounting and ignore the risk caused by substandard water quality; the application comprises the following steps: based on a farmland soil nitrogen budget and hydrodynamics coupling model, quantifying the pollution emission list of subdivided sources in the growth process of specific crops, simulating agricultural pollution dilution water consumption; using a crop water requirement model to calculate the irrigation water consumption of specific crops in the whole growth period; using a source and sink corrected physical flow trade model to analyze the virtual water transfer path hidden in each agricultural product trade link; integrating the production end and the consumption end results to realize high-precision grid agricultural water resource supply and demand imbalance risk evaluation and cascade effect analysis; and the cascade transmission effect of the application in evaluating the water resource risk provides strong support for reasonable allocation of agricultural water resources and improvement of nitrogen fertilizer utilization efficiency.

The application discloses an adaptive method for relieving double risks of water quality and water quantity of agriculture, and belongs to the technical field of water resource management.The method is based on a farmland soil nitrogen balance and hydrodynamics coupling model, quantifies a pollution emission list of subdivided sources in the growth process of specific crops, and simulates agricultural pollution dilution water quantity; a crop water requirement model is used to calculate irrigation water consumption of the specific crops in the whole growth period; a water resource loss evaluation module is established to evaluate potential agricultural yield reduction and economic loss caused by water resource shortage; a scenario library of water and fertilizer coordination strategies is constructed to compare the relieving effects of different adaptive strategies on water quantity depletion type and water quality pollution type water resource risks.The application solves the technical problem that it is difficult to simultaneously cope with water quantity risks and water quality risks to develop targeted adaptive strategies, can effectively relieve water resource pressure, improve the sustainability of agricultural production, realize optimal allocation of water resources, and further guarantee the health of an ecological system.

The present application relates to a small watershed agricultural non-point source pollution intelligent monitoring and early warning method and system based on hyperspectral remote sensing, which solves the defect that it is difficult to real-time small watershed agricultural non-point source pollution intelligent monitoring and early warning compared with the prior art. The present application comprises the following steps: monitoring partition and control section layout of agricultural non-point source pollution; investigation and monitoring of small watershed water environment agricultural non-point source pollution background; construction of small watershed water environment hyperspectral remote sensing background database; small watershed agricultural non-point source pollution intelligent monitoring and early warning. The present application is used for monitoring the pollution situation and change trend of agricultural pollution source and receiving water body, understanding the spatio-temporal evolution law of small watershed agricultural non-point source pollution, realizing real-time dynamic monitoring and early warning of the influence of regional agricultural non-point source pollution on water environment quality, and providing basic support for agricultural non-point source pollution control.