I (with some twist) described the set of $latex C^1$ integral curves for a given vector field in purely topological terms (well, I describe it not in terms of topological spaces, but in terms of funcoids, more abstract objects than topological spaces).
From this PDF file:
Theorem $latex f$ is a reparametrized integral curve for a direction field $latex d$ iff $latex f\in\mathrm{C}(\iota_D|\mathbb{R}|_{>};Q_+)\cap\mathrm{C}(\iota_D|\mathbb{R}|_{<};Q_-)$.
(Here $latex Q_+$ and $latex Q_-$ are certain funcoids determined by the vector field.)
You can understand this theorem after reading my research monograph.
Can you be more specific about the content of your article? After reading it, I still have some doubts. Hope you can help me.