地理空間加重パネル回帰モデルを用いたマハカム川の水質分析
Zabrina Nathania Fauziyah1, Suyitno Suyitno1, Darnah1
1Statistics Study Program, Department of Mathematics, Faculty of Mathematics and Natural Sciences, Mulawarman University, Indonesia.
MethodsX
|January 26, 2026
まとめ
地理空間加重パネル回帰(GWPR)モデルは、マハカム川の水に影響を与える要因を効果的にマッピングします。
科学分野:
- 環境科学
- 空間統計学
- 水質管理
背景:
- マハカム川は生物化学的酸素要求量(BOD)の問題に直面しています。
- 水質の空間的および時間的な変動を理解することは非常に重要です。
- 既存のモデルでは、河川生態系における空間的な不均一性を完全に捉えきれない可能性があります。
研究 の 目的:
- マハカム川の水質データに地理空間加重パネル回帰(GWPR)モデルを適用すること。
- 生物化学的酸素要求量(BOD)に影響を与える主要因を、さまざまな場所と時間で特定しマッピングすること。
- GWPRとグローバルな固定効果モデル(FEM)のパフォーマンスを比較すること。
主な方法:
- 2022年から2024年までのマハカム川のBODに関するパネルデータを利用しました。
- グローバルモデルとしてFEMを採用し、時間効果のためにデメニング変換を組み込んだGWPRモデルを採用しました。
- R、GNU Octave、QGIS、およびGoogle Earthを使用して空間分析と統計モデリングを実行しました。
主要な成果:
- GWPRモデルは、より低いAICとより高いR-squared(80.321%)によって証明されるように、FEMよりも優れたパフォーマンスを示しました。
- BODに影響を与える主要因は、温度、水のpH、色度、硝酸塩、アンモニア、総浮遊固形物、および硫酸塩であることが特定されました。
- この研究は、これらの影響要因の空間分布をマッピングすることに成功しました。
結論:
- GWPRモデルは、環境研究における空間的に不均一なパネルデータを分析するための強力なツールです。
- BODに影響を与える要因を正確に特定することで、マハカム川の水質管理戦略をターゲットにすることができます。
- ローカル分析は、グローバルモデルと比較して水質ダイナミクスをより詳細に理解することができました。
関連する概念動画
Quality of Water
553
In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...
553
Testing Water Quality
387
When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...
387
Regression Toward the Mean
6.9K
Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when...
6.9K
Multiple Regression
3.9K
Multiple regression assesses a linear relationship between one response or dependent variable and two or more independent variables. It has many practical applications.
Farmers can use multiple regression to determine the crop yield based on more than one factor, such as water availability, fertilizer, soil properties, etc. Here, the crop yield is the response or dependent variable as it depends on the other independent variables. The analysis requires the construction of a scatter plot...
Farmers can use multiple regression to determine the crop yield based on more than one factor, such as water availability, fertilizer, soil properties, etc. Here, the crop yield is the response or dependent variable as it depends on the other independent variables. The analysis requires the construction of a scatter plot...
3.9K
Wood Panel Products
370
Wood panel products are essential materials used in construction for applications such as flooring, siding, and roofing, typically available in standard dimensions of 4 feet by 8 feet, with thicknesses varying from one-quarter of an inch to one and one-eighth inches. Among the most common types of wood panels is plywood, which is produced by gluing multiple layers of thin wood veneers under pressure. The grain of the outer veneers runs lengthwise, while the grains of the interior layers run...
370
Correlation and Regression
3.4K
In statistics, correlation describes the degree of association between two variables. In the subfield of linear regression, correlation is mathematically expressed by the correlation coefficient, which describes the strength and direction of the relationship between two variables. The coefficient is symbolically represented by 'r' and ranges from -1 to +1. A positive value indicates a positive correlation where the two variables move in the same direction. A negative value suggests a...
3.4K


